So i had my little boy 4 months ago, i had a normal period around 6 wks after then i started birth control (the pill) & i ended up bleeding for a month so i got off of it and missed a period for a month and just started my period again 2 days ago and ive been bleeding super heavy since and ive been nauseous, stomach issues, cold chills, tender breasts, back pain and headaches since. Is this normal?