I need answers!!!!

Ok y’all please help me!!! So I’m on bc pills meaning I have a period every 4th week. So this last time my period didn’t come till wk4 da4 pill which has never happened!! Ok so I’ve started a new week and I’m on day 3. This last week and a half I’ve been HORRIBLY EMOTIONAL AND TOUCHY!!! (Just ask my husband) I feel so bad cause it’s truly not how I want to be but I just can’t help it😪 what is going on????