My last period was March 30, 2013 I was fertile the second week of April. I had sex with a friend on April 10, 11, & 12 it says I conceived April 13, we used a condom, but he's not sure if it broke. A week later I had sex with my child's father April 18 without protection my next period was due on April 27 I'm for sure that number 1 is the father by conception just need answers if I'm right?

You need a DNA test to be sure. There is no way to tell since this is too close with both guys.

I go to the Dr next Thursday to find out what I'm having my Dr said once I get an ultrasound I should have a clue it will tell me exactly how far along I am and I can go off when I conceived

I don't know what your doctor actually said, but estimating your conception date is an inexact science. There is no way your doctor can pinpoint conception more accurately than a 2 week period. So it could be either. The ONLY way you can know for sure is with a DNA test after the child is born.