1st period since Birth HELP! tmi

J
So I had my baby may 2016. I got my first period Thursday. My son is almost 11 months old. I was breastfeeding and Im pretty sure that kept me from getting my period. But lately he hasn't really been wanting the breast and going more for baby food. Well the first day was ok. Friday and today has been a nightmare. It's so heavy. I've always had a heavy period but this is just ridiculous. I fill up an overnight pad within about 3 hours but it's FULL to the back and it even spills out of my pad. It's soaked my underwear a couple times. So embarrassing. Last night I changed my pad. I went to sleep with a clean one. Woke up and as soon as I stood up it all came out and completely covered the whole pad. Has anyone else experienced something similar?