is anyone else prescribed seroquel/quetiapine for prn? for sleep aid or crisis etc, just not on a full regiment kinda thing

if so what were ur experiences like?

i just got prescribed &amp; i’m feeling really hesitant to try a new antipsychotic. 
was on haloperidol &amp; olanzapine before which are supposedly associated w more side effects but i’m still a bit terrified

i feel as if i can go without medication n could help myself in these areas without this risk of side effects 

e.g increased prolactin which i already have &amp; increased blood pressure cos i smoke a pack a day most days

any input is appreciated