Anti anxiety weight and periods

I have recently been put on anti anxiety/ depression medicine... I am also on the shot... both have side affects of weight gain... well I’ve been doin well with loosing weight I’ve lost 11 pounds since Jan... however... the shot is supposed to stop my period ( I’ve had 3 so far) and here lately it’s like every time I wipe there’s blood like I’m trying to have a period... this is really screwing with my sex life... what’s y’alls opinion on what I should do?