I am a 28 year old woman who had unprotected sex twice, once on feb 20th, 2018 (5th day of cycle) and on may 8th, 2018 (23rd day of cycle). Starting from may end of that year, I had been having two main symptoms. One was shortness of breath at rest especially in the evenings and two, I could see abdominal pulsations when lying flat or sitting. I had my periods every month but was a bit delayed than usual most of the times. Even now, my lower abdomen feels hard and I feel flutters in my stomach once in a blue moon. I took a home pregnancy test twice during this year and it was negative both times. It has been 52 - 64 weeks since I last had sex. But i'm still paranoid that I may be pregnant because of the shortness of breath and pulsations. Please help me.