feeling blah

I had sex about a week and a half ago. We didn't have any type of protection. He pulled out but told me he didn't pull out fast enough. And it just so happened to be in my ovulation period. I recently got the worst runny nose, sore throat, it sounds like I smoke 2 packs a day (but I don't smoke) and it came out of absolutely no where. I get cramps randomly on my lower stomach and after I try to eat food I feel like I need to go to the bathroom or throw it up. I know there's a chance I'm pregnant but has anyone else ever felt this way? And when should I test?