IUD related questions

Hello everyone, so I'm new to this app and so far I'm liking it. My husband and I are planning to have our first child, so hopefully this is THE app for us! I've been having my Mirena for about 4 years until Thursday was when I had it removed. The doctor told me that it depends from woman to woman, my body needs time to adjust back to how it was before with my menstrual cycle. Well we had sex Sat, and everything was good! My husband said he didn't feel the string poking him anymore and he actually felt way better now! Today, Sun I had a lot of bleeding (it felt like I was peeing in my pants)! I went to check and it looks like I'm on my period? Is that normal? Has anyone with the IUD have this happen to them? Thank you in advance!!