Pregnant or not!?

Bella

<a href="https://glowing.com/glow-fertility-program">IUI</a> on November 8th. Spotted two random days before aunt flow was due. I’ve had positive line tests since 10 DPO. BUT my period started 11/23 two days ago, it was a normal flow, but only lasted a day.... so today I decided to take these today and got positives.... I called my fertility specialist and go in tomorrow for blood tests.... has this ever happened to anyone before? I don’t know whether to think this is it, or if it’s a chemical!?