Glad to hear you're doing better. If they come back at all don't fret to contact a doctor again.

Will do, stinky <3

It's good to hear that they've stopped, though I understand it can be frustrating not knowing what caused them. Personally, I'm alexithymic, which means that I don't recognise when I'm experiencing anxiety or other sensations until they're pretty severe. So, for me personally, I'm really bad at noticing when I'm anxious, but I often notice palpitations etc.

I get how you feel about writing... Sometimes I go months without writing a single word and then go mad writing 2000 words a day. The only advice I can offer is to try to make writing a healthy habit. Aim for something like 250-500 words a day and write literally anything. Maybe try vitamins in place of caffeine? They won't make you feel any more awake, but they couldn't hurt!

Most importantly, though, be kind to yourself. We aren't machines capable of churning out endless products. And even if we were, machines sometimes need maintenance! I know it's easier said than done, but give yourself some TLC :)

That's great news. Our bodies do weird things sometimes, but we are naturally resilient.

*steps onto soapbox*
The transitional period from college to career is perhaps the biggest shift in life (besides having kids), so it is natural to feel stressed out about it. Anecdotally, I have observed that it is the ones that aren't stressed about it that struggle the most to find their career footing. It might help to frame your perspective to temper that stress and use it to your advantage. Instead of comparing yourself to your boyfriend or anyone else, think about how the overwhelming majority of people successfully make that jump--many of them with less drive, intelligence, and skills than you. And everyone makes it in their own way. You have the support system to make it. It may take patience and an open mind, but you will find your way--even if the destination seems uncertain at the moment. You have skills to bring to the table; discover and embrace them as you search for and test out your fit in the workforce.
*steps off of soapbox*

The best energy supplements are a good sleep routine and regular exercise (and I already know that you are doing pretty well on the latter, at least *wink*). The work-life balance may help with your writing, and it will definitely help with your transition to a career. (Plus, they will likely even help support your heart.) If you can schedule time to write every day, then great! If not, that's why we have back burners--your stories can simmer for as long as they need to. A dedicated writing block can feel like a recipe for, well, writer's block, but having that period to express yourself often pays off. Your writing can be anything: fetish-related mini-scenes, general creative prose, poetry, introspective journaling. Make a quick note whenever inspiration comes, and see if you care to expand on it during a future writing session.

Good luck, Denya! I am looking forward to hearing (and maybe seeing?) how your fat fur idler turns out.

Gosh, I glad to hear you're doing okay!
It sounds like taking a break is needed. At least until you're out the transitional period.

Best wishes on the writing!

I'm going to say your best bet is probably stuff with B12 Lol
Zipfizz or something.

When it comes to energy, I'll echo some of the other statements here. Avoid energy drinks like the plague, those things are more often than not frontloaded with caffeine and sugar, look into vitamin supplements, honestly consider drinking water instead of energy drinks, if not that try tea, if you have sleep issues, talk with a doctor about possible sleep supplements as your energy problem may be a sleep problem in practice.

I don't know your specific intake of energy drinks, but if consumed enough, they can cause your heart to do nasty things, and this is coming from a complete and total soda junkie. You could have had an energy drink one day, it finally tripped something in your heart, and cue the palpitations for a while until it got flushed out of your system.

Other than that... one of the most prolific authors ever had a 2 hours a day workrate, which is to say 2 hours a day and no more than 2 hours a day were spent writing, whether it was good, bad, beautiful, or ugly. The best advice on that end I can give is basically the power of positive thinking and the power of getting into a solid routine. Tell yourself you can do it, get yourself into a solid routine, and eventually your mundane becomes astonishing to the rest of us. I'm sure this is like telling someone with depression to stop being sad at a certain level, but that's at least a concrete goal to potentially strive for.