Well my period started on May 17, 2011and it only lasted 4 days instead of the usual 6 and it was lighter than normal. My period comes and go like clock work. Then June comes around and nothing (my fianc and I also had sex on June 25th) still nothing. Now on July 21, I got what I thought was implantation bleeding brown discharge that only lasted 2 1/2 days then I took three hpts and one had a faint positive and the other two were negative. Then on July 29 I started bleeding very very heavy mostly blood clots, I went to the ER where I got a negative blood test and the doctor told me I have a couple fibroids. Then August comes and no period at all. Now on Sept 8 I started my period and it was shorter and lighter. I started having a lot of pregnancy symptoms in July.

What exactly is the question? If you are having unprotected sex then yes there is a possibility that you are/can be pregnant. The blood work tests are usually the most reliable, but of you are having issues with fibroids, this can mess with the regularity of your periods.