Am i pregnant?! can someone please give me advise and not just 'take a pregnancy test' thanks.?

I had unprotected sex with my boyfriend two days after i finished my last period then two weeks later we had unprotected again. About two days before my next period is due i had unprotected sex again. I should have my periods round about now and normally get a sore back which i haven't got. Recently i have been feeling sick normally gets worse after i eat but ive not actually been sick. When i do eat i just feel hungry again as if my stomach is about to grumble. I think its too early for a pregnant test as my periods might just be late, but im stressing out. Please help.