Your symptoms do sound like you are preganant... I had similar symptoms and also constipation when i was carrying...I had stopped my BCPs for 2 months as i wanted to get pregnant, and i concieved in the 3rd month and was having thse symtoms almost by 10 days after my fertile period was over..Meet your gyne and ask for a confirmatory blood test (some hormone test it seems) which is more accurate than the urine pregnancy test. Mine was negative two times even though I had these symptoms, so my gyne did tht blood test for me which confirmed that I am pregnant.