Something wrong with me

Since got pregnant I became moody I guess because of hormones playing up then after giving birth it was worse , massive mood swings and sleepless nights didn't help. Now she's 5months old and it got easier but I'm still having mood swings I just feel sorry for my bf , sometimes I think if we swap places and I would be him , it would be so annoying to have women who's not happy most of the day. I don't want to be like this but I can't help it. 😵😵😵😵