why am I bleeding again?

Lizzy • I'm a first time mom to my handsome little boy who was born 8.26.17💙 he makes me incredibly happy. follow our journey and I'll follow yours!😘🙂

I'm 9 weeks pp, and I got the copper iud a week ago, my period started the 16th, and ended either 22nd or 23rd. and I had sex last night and I woke up to me bleeding.😯 I'm just super confused why. and I'm having cramps too.. anyone know what's going on?