IUD and pregnant?

Jessica

Hello, so I got my IUD put in a little over a month and a half ago. I had sex last week (no condom but he didn't cum inside me) and I'm nervous since I don't get my period anymore (cause of my IUD). Today my nipples felt really sensitive and I was confused and wanted to ask peoples opinions? I'm out of town but I'll be home in august and I'll take a pregnancy test then. Am I just overreacting?