What are the chances?

I'm late for my period. I had a bit of spotting on the 10th and that lasted until the morning of the 12th.
I had on the 16th of March, a bit of *** got inside of me. Then again on the 25th, he came inside twice. On the 9th of April, he came inside once. Then again on the 14th of April, he came inside once.
My last period started on the 8th of March.
What are my chances?
I've also taken 5 hpts and they were all negative. (taken at different times)