This is not your typical question?

Ok this is really odd to me. I am having many signs of being pregnant but all the home tests say neg. I go to the doctor with cramps that started over a week ago. I thought I was getting my period but now I am a week late and it's starting to hurt a little bit. They checked for pregnancy and infections by urine test. They felt for cysts and lookig for infection. Everything came back fine. I have had a little bit of problems lately with constipation and they said that could possibly cause pelvic pain. My started hurting yesterday. I have a three year old and I fed her. I just quit producing milk from my a few months ago. Well out of curiousity my hubby asked me if I could get milk from them. Well I got a clear and then white liquid. I have also started peeing more frequently but hardly anything comes out. But remember, no infection. This is so odd to me. It took two years to get our daughter and we just recently started trying again in feb. Could I be pregnant so soon? I am afraid to believe it but what else could it be? I have taken three tests at home and one doctor one. I may go Thursday to get a blood test done. Could it e anything else but pregnancy?