My body frustrates me

Well I went to doctor today to get a confirmation of my at home test being positive. Everything came out negative (still waiting in blood work). From what the doctor said I had a cyst that ruptured and caused a false positive. I had no clue that could even happen. I was aware that my cysts come and go but I had been fine for a while now and had no inclination that I had one in the first place. I’m so sad and frustrated and confused. :,(