IUD issues

Teana

My period ended on the 12th with last little bit of blood ending on Sunday I know my boyfriend came inside since I had a IUD but im starting to feel funny (nausea last 2-3 days and twinges in my nips also a lot of clear discharge) I know that it’s impossible to be pregnant for many reasons (IUD in place and was just getting off my period) I’m just confused birth