Hello! My last period was on July 28th and I had sex one the 3rd and 7th of July with a condom and the condom did not break or slip. I also had sex aroubd august 16th and my period was suppose to start on the 19th of August. However during this time I had to give 15 vitals of blood because my doctor said that my hemoglobin levels were low so they ran tests which stresses me out and it turns out I have iron deficiency anemia and also I have thalamus (low red blood cells) and also I started taking birth control 2 weeks ago and I just started college. I took 2 pregnancy tests a couple days ago and they both came out negative so I am scared I could be pregnant