Hi doctor.

So i did a digital HPT and it says that I'm pregnant for 2-3 weeks. I went to an obgyn because I keep bleeding and she took me for a bloodtest. Hcg count was 375 and 48 hours later it became 405. Because of the slow rise she suspected an ectopic and i had a laproscopy. Then she found out there's nothing at my tubes nor ovary.. but there was a cyst at my uterus. Later she said that I might not be pregnant after all. How can this be if I'm already late for my period, had nausea and a positive test but not pregnant?