Period???

I stopped birth control but I didn't stop right away after my next pack of pills I think I took like 4 of the first week but now I am cramping a bleeding not heavy but not light bleeding..... Is this normal? Has this happened to others or is this just me? Some think becaz I am a bigger girl I have irregular periods but I have NEVER had period problems until I am on the pill or "coming" off the pill. So frustrated right now 😔