Need help for fried brain

Im pretty desperately looking for advice rn.

After years of only smoking weed at night, I experimented a bit too much. In the span of two weeks I tried cocaine, mdma, Adderall, and LSD.

After that first weekend with the coke and Molly I haven’t felt like myself. I’m super depressed and feel hopeless and there’s this underlying sense of dread. I also got crazy lighteadedness and brain zaps that persisted days after.

I’m worried I gave myself permanent brain damage or fucked my serotonin, since reality feels darker now. I miss my normal self, any advice is appreciated 🙏 (I’ve been sober n not planning on taking more)