I have been on linessa for more then six months now and on my last set of pills i didnt notice that they were exspired and during that time i had unprotcted sex, would i be pregnant?

right now i my stomack feels really full and i have vomited just a little last night then the pain went away then it came back and i have diareah would it be because i have a stomach flu cause this morning when i work up didnt feel lik throwing up just have little stomack pain but when i got the the washroom and take a pooh or fart i feel better and the stomach pain lessens ... what would it be im really worried ..