Should I or should I not ?

So me and my boyfriend hav Ben having unprotected sex for a while and a lot during the month of May. I didn't have my period the whole month. I have irregular periods anyway so i never know whether I'm gonna have it or not. But I get kinda nauseous but I never actually get sick. My boobs kinda hurt when I touch them I'm tired and have a headache almost all the time. I've been having some really bad cramps and pain in my right side mostly. But it will switch sometimes. Does it sound like early signs of pregnancy? Or what's going on?