Hello,

I am 21 yrs old and me and my boyfriend don't use protection. My last period was on June 28th/2012 and I had unprotected sex on July 9th, I have used an ovulation calendar and it says that I was fertile then. My periods are normally regular and I was supposed to get it on the 26 of July but it still hasn't come. I am extremely tired and have been sleeping all day but at night I find it hard to sleep and I am urinating more often. I have also been getting mild to severe cramps and the constant feeling of always being full or nauseaus. Do you think its possible that I may be pregnant?

Of course its possible.

Btw, Ovulation calendar's are useless and at best, only a guess once you tell it what your "average" cycle is. When I conceived my daughter, I ovulated on the 7th day of my cycle. Ovulation calendar's only go by day 14 in most cases.

Take a HPT - and follow the directions carefully, using first morning urine.