I want to know if I may be pregnant. I was pregnant a year ago and I was takin urine test that came back negative but when a blood test was done I was pregnant. I had a tunal pregnancy so I had to have emergency surgery to have the baby removed from my left tube and also had to get my tube removed. For the last 4 months I have been having unprotected sex and thinking I could not conceive but I have had irregular periods lasting 2days or a week late now I experiencing mood swings, stomach fluttering, vomiting sometimes not often, sleeping more, yesterday I experienced lower back pains for the first time, chest and stomach getting bigger but I have taking numerous pregnancy test and they come back negative. Could it be possible that I may be pregnant ago and could it be urine test do not work for me?