Anyone else going through this???

So I had my son May 31, 2018. Before I got pregnant my periods were always terrible, painful, and extremely heavy. To the point I was convinced I had endometriosis because it took almost a year to get pregnant also. After I delivered my son my the doctor t

hat delivered me had to go back in and figure out why I was still bleeding. He said I have a bicornuate uterus, which explains all my period problems!!! Well since I started my period after having my child my periods HAVE BEEN WORSE!!!!! Something I never thought possible. I’m bleeding extremely heavy. Like bleeding through a super + tampon AND a heavy flow pad in an hour. Stood in a puddle of my own blood one morning as I was trying to het to the bathroom... Bleeding through the tampons in 20 minuets. And my clots..... girl I never knew something so big could come out if there.... the picture I’m going to share is wayyyyyy tmi but I was passing this mf through my tampon!!!!!!!!!!!!!!! Never have I ever. So I went to my gyno and he did an ultra should and said I have a long uterus but he expected that since I just had my baby (he’s 5months) and that my uterus doesn’t look like it’s bicornuate....???? And told me he wants to put me on birth control to help control it.... mind you I’ve been on bc since I started my period because the bitch has been well.... a bitch since she arrived. Should I go get a second opinion from another gyno because I just don’t understand what’s going on with me and he’s not taking it serious. Anyone else having this problem?? I need answers..