I'm 25 and I found out I'm pregnant almost two months ago. I went to my first prenatal visit and they didn't do an ultrasound but they told me going by last period I'm around 12 week that was last week. By this Saturday I should be 13 weeks. I desperately want to have my first ultrasound as this might ease my mind about who the possibility father could be. Now to the confusing part. My last "normal" period was on January 21, 2012 and I did not get a period on February which Isn't unusual for me because my periods are irregular. Well I cheated on my partner on February 10th and then again February 13th. I had both protected and unprotected sex with this person but he claims he never came inside me. During the rest of February I didn't have intercourse with my partner that I can remember. Well on March 9th I had my period which was very light, but then again I had periods like these in the past but ever since I found out I'm pregnant I'm scared that it could've been implantation bleeding