Positive pregnancy test and period?!? Help

I got my period Monday. Normal heavy flow.

Dr did pregnancy test on Thursday to start another <a href="https://glowing.com/glow-fertility-program">iui</a> round and I got 15 hcg positive test.

Wen back today (Monday) and my number is 156!

But I had a full period during this entire time!

Will my hcg start to fall? Am I really pregnant?