Don't know what's going on.

Keya • Mother of 2👶🏾👧🏾. Looking for friends 😝
I have liletta the new IUD. I absolutely love it. But my only problem is every time me and my husband have sex and he cums in me the day after I start to bleed for at least a week. 
This happens every time we have sex. I just was wondering if this was normal.