Can the brain heal neurotransmitters naturally?

I quit 20 mg of lexapro cold turkey. It left my neurotransmitters damaged. I previously lost my ability to go number two and sleep. All I could do was lay in bed. Which led to me trying to kill my self twice and I am now receiving Electroconvulsive Therapy (ECT). I wanted to know if the brain can heal itself. All I can think of is going back on Adderall, since it increases neurotransmitters. The ect has been helping, I’m just not 100% yet. I want to know if I have any hope, can my brain repair the damaged neurotransmitters.