Irregular bleeding

Julianne

Hey all! Just wanted to get your opinions. I just got my period back (I think) after having my now 10 month old. After 2 weeks from the start, I started bleeding again. I have an IUD that was put in 8 months ago, and this is the first time so I don’t know what to expect. Oddly enough every time, I had sex and 2 days later the bleeding starts. Super confusing. Any input is appreciated