Could i possibly be pregnant?

My boyfriend and I had unprotected 4 times on August 22nd. And now my have started to hurt really bad. Even if I lift up my arms my s start hurting, I've gotten really thirsty. I could chug a whole water bottle and I'm STILL thirsty. I get hot and sweaty really easily now and tired too. My lower tummy and my have been really itchy too.