I'm 23 years old, I was diagnois with endometriosis when my son was going on 8 months old. He is now going on 19 months old. My fiance and I have been trying for another baby since we know that it can take a while to have another one since I have endometriosis. I haven't had a period since April 2nd(my last period), lately I've been feeling even more nauseated, bloated, tired, cravings for basically the same foods as I did when I was pregnant with my son. My Gyno had me take 3 blood pregnancy tests in the last 2 months, it was negative. Home tests=negative. I called him again and told him and it aggravates me because he was supposed to call back Friday, so I called today and still nothing. I have to go to the short stay surgery tomorrow but I was wondering could it be possible that the blood and urine test can come back negative even if that person is pregnant?