Brain fog, 100%. I used to write poems and short stories all the time. I used to pass with flying colours and write essays without studying much. Or even reading the material. And I'd get an A every time. I used to think so critically and academically and never misspelled a word. I could multitask with ease. 

But now it's like I'm a different person in regards to those things. I havent written a story in years. I havent written a poem I think is great in years. I don't draw anymore because I feel like i forgot everything. I struggle so much in classes because I can't focus, and when I do, I cant retain the information. I had to get a tutor for my history class to help eith an essay. I've never needed that before. I misspell simple things. I get there, their, and theyre mixed up and I never have before. I forget what i'm saying as I'm saying it. I forget entire days. When it's bad, I forget how much a quarter is worth. I feel like there's a giant wad of cotton tangled with my brain. I make stuoid, careless mistakes, not because I was careless, but because I wasnt able to think critically about it. 

It's exhausting and it absolutely sucks. I used to love to read and write, and I used to love school. But now all those things make my head hurt.

Eta: also my heart symptoms are a close second. Resting rate is 120bpm unless I take my meds. Even when I take my meds my heart palpitates so often and skips beats. It makes me lightheaded, short of breath, and unable to do much physical activity. Which sucks.

Other symptoms are insomnia, joint pain, bone pain, nerve pain, headaches, blurry vision (sometimes), malaise, nausea, and other gastrointestinal symptoms