Hello, I've been having dyspnea on lying down and also seeing abdominal pulsations on lying down for past 3 weeks. The dyspnea goes away during my periods and comes back after day 7. I had unprotected sex in February on the 5th day of my menstrual cycle. However, I've been having regular periods that lasts for 4 days (heavy for 3 days and spotting on day 4) (I usually bleed heavy for 3 days, light on the 4th day and spotting on the 5th and 6th days). I've taken 2 home pregnancy tests both of which came out to be negative. I've read about cryptic pregnancies and I'm really scared.