Okay so I haven't had a period since January 6, 2011. It is now March 28. Almost 3 months with no period, which is very weird for me. I am not on birth control and my fiance and I are not trying to conceive but also not trying not to, if that makes sense. We made love on the 21, which would have been during my ovulation. I am not skinny, but I know my body and my stomach is getting tense. I have pain like light cramps in my lower abdomen, back pain, headache, nausea, change in apetite, and the obvious lack of period, but every test I have taken has been negative. I went to the gyneocologist and she did a urine test that also came out negative. I want to be pregnant, and I have read that some women do not produce enough HCG to read positive until 4 months or so. Is this possible? If not, what else could be causing this lack of period? Any help on the subject would be nice. Any similar experiences? Thanks,