i had an upset stomach on holiday and had the number 2s. i am on the pill but was still having sex as i didnt realise it cancels the pill out. this was around 2 weeks ago. i have come on a period but it is very light and dischargyish, not normal for me! just done a pregnancy test was negative. a friend told me my light period may be due to my worrying. do you think i am pregnant?