Why is it short?

Ok my period is usually a week long and a few days ago I got what I thought was my period but it was only two days... Me and my boyfriend are trying to have a bby, we have been having unprotectd sex for the past 3 months and well my periods keep on...

coming but their only 2 or 3 days long, so why is it short?? I've done pregnancy tests and they all come out negative.. Does sex affect my menstrual cycle?? It has never affectd me but why now??

Hello, I have read through your message and im very concerned about this, you need to see your local gp or your local clinic to have a chat about it, they will do a couple of tests and they will find out if you are pregnant or you have an infection, let me know (:

The sex will not affect your menstrual cycle, although you stressing out can. It's possible to experience shorter or no period at all when you are stressed out, and you seem to be since your trying to have a child. a lot of women forget to enjoy that time and get so focused on trying to have a baby they do themselves more harm than good.

If your concerned see your doctor, but it sounds normal to me.