I've been in a situation like that with haloperidol
I reduced my dose by 20% due to side effects but this caused withdrawal symptoms. Insomnia, anxiety, paranoia, and later hallucinations
Long story short the remaining dose I was on was yanked by my psychiatrist along with pregabalin and basically every med I was on which made everything so much worse I spent 2 days in the ICU
I drank very heavily and sustained multiple injuries due to repeated falls
I was in antipsychotic withdrawal for a good 3 months before being put on Loxapine in hospital
Luckily you don't need to wait that long