Hi,I m 28 yrs old,trying to get pregnant from February. I have a pretty regular 31-36 day cycle. My BMI is 23.5. I expected my period 9th of March but till now,it didn t show-up. I had un-protected sex on 22 of February and before. experienced spotting on 22 and 27th of February and brown spot about 5 days after.I don t feel nausea or anything, but got 3 negative pregnancy test.I m feeling very worried. Thanks.n