Normal or no?

I was on the depo shot for 5 years then j switched to a pill bsck in October, I noticed some few changes in a couple of things but the biggest thing was my boobs and nipple hurting and itching. so I stopped taking the pill since February, it's been a couple of months and every things has been Fine since but I had my period for 3 weeks this time around and then my boobs and nipples have started back up. What could this all be? Is this normal? Please and tia;)