Period

So, I’ve been on the pill for about 6 months now and my body still hasn’t regulated to it. I still get my period late. The first month I didn’t have a period. This month my period has been incredibly spotty and when it does happen it’s muscusy... There’s not chance of being pregnant because I haven’t had sex in awhile.

I’m just not sure if this is normal or not. I don’t know if I should talk to my doctor???