If you were 15 weeks you would be showing positive on a test by now. If you are concerned best thing to do would be to get checked out at the doctor. While you are there they can do a blood test to completely rule out pregnancy.
if i am pregnant then i would be about 15 weeks..i just took the 4th preg test and it says negative. im just confused if it is IBS or if im pregnant.
IBS is not a common pregnancy symptom although there are definite pregnancy symptoms that can make you feel like you have IBS. Women usually start experiencing pregnancy symptoms anywhere from 5-8 weeks and some lucky women never experience any of the tradition symptoms. It really all depends on how your body reacts to the hormones.