Has Chronic Illness completely changed your personality?

I am recovering from this mysterious chronic illness (i am a very young man).

I was sick for soo long, felt in such a altered state of mind, felt so anxious, stress, depressed, fogged, for sooooo long that i have lost who i am.

I dont remember what my identity and personality was like before my illness.
I dont feel the same about my passions.
I dont feel the same about the friends i love.
I dont feel the same about the activies i engaged in.

I dont feel like my oldself anymore.
Like i forgot who i am from being sick for soo long.

My old self was built on a strong foundation of life experiences that shaped me into a very well balanced human being and chronic illness, being in a altered, unnormal state shattered that foundation and i feel lost like i am tossed in the ocean.

The good news is that my body is feeling better and better each day.
The bad news is that i have been inactive from life, (i had to take a break from everything) that i dont know who i am anymore and how to move forward with life.

I know this is all mental turmoil, but this is precisely what i am experiencing right now.
This is the aftermath of chronic brainfog.

Comments, opinions, advice anyone would give to a 22year old man?