Relationship/mental issue

I’ve been in a relationship with my fiancé for 4 years.. we have 2 sons together. It’s always been a bit rocky since we’ve had kids. He never helped out much and he was an alcoholic drinking everyday. He wasn’t drunk everyday but he did drink everyday. Well recently about 4 months ago he wanted to stop drinking and started having withdrawals.. having hallucinations.. he was in the hospital Twice and they said he has psychosis.. he started seeing a psychiatrist and she prescribed him meds.. it’s been two weeks since he started the meds and he’s still having thoughts in his head that aren’t real. Has anyone ever experienced this before? Any advice would be appreciated. It’s been super tough.