UPDATE

I think you guys might have been right about hypomanic state.
The past few days I've been noticing my mood improving, while also becoming more irritable and energetic. My anxiety has increased, even though Escitalopram normally reduces it for me, I have more OCDish thoughts. Ok - energy level is difficult in my case - I have hypothyroidism and maybe the medications are finally kicking in, they are suppsoed to incrase my energy levels but shouldn't touch anything else.

Today I woke up with racing thoughts, after spending half the night thinking about a scientific problem.

What worries me is that my self-outlook is improving at a dramatic pace. I catch myself having these specific thoughts which appear delusional; my head was full of these thoughts last time of what-I-think-was hypomania. Examples include "I know I'll become a brilliant scientist one day" and "hey, maybe I could patent something". They startle me. But I don't want to stop. I feel so good. What do you think guys ? My doc told me to stay on meds for 4 weeks (Escitalopram, SSRI, yes he insisted). If it stays like that it's great, but what if it escalates?

Could use advice. Maybe it's not hypomania, maybe just SSRIs taking effect? It is very difficult to tell for me, as I'm mostly depressed and I am not 100 % positive I'm bipolar. How would I know if it is?