Am I pregnant or not?

I had 2 unprotected sex. One on the 18th and one in the 22nd both in the month of May. That means, he exploded in me twice. I didn’t took the plan B and I don’t use birth control. Recently, I’m stressed out since I’m thinking if I’m pregnant or not. I lost appetite, sleeping at 2 am, and sometimes I have this urge to vomit. I haven’t gotten my period yet since it is predicted that I’ll have one on May 31. Am I pregnant? Should I get a test now?