Missed Period

Brittany
Okay I'm going to give solid deets here and I want some input please!
First day of my last period was May 16. They run about 5 days, and my cycle is about 31 days. 
I had sex a few nights in a row, unprotected during my fertility window. He always pulled out(and I know that that doesn't mean you can't get pregnant.) 
The 8th of June we had sex again, and to spare you the details things got a little wild and somehow I bled a little. It was really light in color and only last a couple hours and there wasn't that much there, but still, it was there. Didn't feel any cramping or anything. 
I'm roughly 5 days late for my period this month now, and I've taken multiple home urine tests but they've all came back negative. 
I'm wanting some input on whether or not I may just be too early, or if I'm probably not pregnant and I'm just late for some reason, or anything. I don't know what to do and I'm so anxious and nervous to find out what's going on. Has anyone ever had a blood test this early and how accurate are the results?