I have endometriosis. My periods are totally screwy !! I bleed sometimes in the beginning... It's very faint and sometimes a brown/red color..Then it'll stop. My period then begins sometimes a few days later.. So I basically end up having to deal with bleeding for 10 days. It's a pain in the ass.

Sex can sometimes be painful for me too with this condition.

I've had 2 surgeries to burn off the endo tissue and clean my tubes. It keeps coming back, and there's no cure for this.

Yes, it's normal. But I hope you are getting checked regularly to make sure.