Missed Period?

Brenda

I got my IUD in the middle of October, kyleena. My period before the IUD was light and lasted only 3-4 days, the cramps were just awful. My period was super heavy the following two months, the third month was honestly just spotting, and my last period was normal. I was supposed to get my period 8 days ago and it hasn't come. I haven't had any symptoms, I feel completely normal.

I have a boyfriend, we have unprotected sex and he comes inside of me every time. I often check my string and it's never been out of place or anything. Could this just be the IUD making me miss my period or could i be pregnant?