period lasting 3 + weeks?!

Briana • Married💍 Mother to JeanCarlo & Mia 💙💖
Hey ladies so I had my baby 10/10/16 & since I had him I've been on birth control (the pill) well about 3 weeks or so ago I started my period again (2nd period since I had the baby) & I have been bleeding since, nonstop with cramps and all. Is this normal? My first period after the baby was not like this at all. I have never had a period last this long & it hasn't even gone away! What is happening?