Seroquel effed me up all day

I took 150mg quetiapine at bedtime for next day anxiety along with my regular sleep medication, cyamemazine, because I discovered 200mg quetiapine doesn’t make me sleepy by itself.

This morning everything turned black every time I stood up, it hurt my head to even sit up, and I’ve felt drunk and hungover all day. I couldn’t leave my bed until 10:30 am, physically couldn’t stand up without getting incredibly disoriented.

Should I give up on this med or try just 50mg?