Pregnant with IUD?

Megan

so I have a baby who will be 5 months on the 8th. I had an IUD put in at my 6week PP check up. I got my period a little over a month ago but am breastfeeding so I just thought maybe that's throwing it off a little. However, I have heard stories of people getting pregnant on the IUD so I just wanted to be sure. Little freaked out, I swear I can see a faint line and I will test in a few days to be sure. Just wanted yalls opinion. Thanks! (Original pic and edited)