Pregnancy worries after too many i pills

I had unprotected sex 3 weeks ago and ate an I pill. Again the following week I had unprotected sex and I ate an I pill again. But both the times it was safe he didn't ejaculate  inside me.but the next day after I took the second I pill that is on 29th, on my ovulating time as per Flo calculator, we had unprotected sex and he ejaculated inside me. we took an I pill within 24 hours.but I was ovulating during the time..I was so tensed that we didn't wait for a missed period. My period date is on 15nth. We took a beta blood test on 9th and it turned negative.since it's a little too early can we trust the results? Also on the 10th we had protected sex but condom broke so I took an I pill again.i know I messed it up..but please help! When can I take a pregnancy test after all this mess for an accurate result? Will I be pregnant? Please help!