Period after baby.... opinions!?

So I'm on my second cycle after having my son almost 6 months ago. My first one lasted 3 weeks & 3 days! So far, I'm on day 18 of this cycle.... and it's been so heavy it's not even funny. I soaked through a super in no time at all the other day, and I've NEVER soaked through a super! EVER. Might be TMI, but I was changing my tampon earlier and a blood clot about the size of a freaking quarter came out! Is all of this normal!?! My periods were NEVER like this before I got pregnant...... but I feel like I'm on my cycle more than I'm not. 🙄 I'm a ftm so I don't know how this whole "period afte baby" thing usually goes and what's normal and what's not...