Me and my boyfriend have unprotected sex in da last two months my cycle has been shorter then normal. I've never had any problems with it before and I have been getting a cycle since I was 11 and I am now 27. This month my cycle came back after only 2 weeks afte it went off and only stayed 4 days which is 2days shorter then normal And in January it only stayed 3days.Now at the end of this month my breast are swollen and my nipples are sore. Normaly when my cycle is coming on my breast or sore but never swollen and my nipples never hurt. Could I be preagnet.

You could try a pregnancy test and find out. Be sure to follow the directions carefully to obtain the most accurate result. If negative, it may be that your cycles are off a bit. You could then either wait and see what happens in March, or see your doctor about having a blood test done.