Help for a worried 23 year old!

Hey guys,

I had unprotected sex 22 days ago, he pulled out but I’m unaware I could still be pregnant. I haven’t had a period in 16 days, I have no symptoms apart from getting hungry at night (not sure if that’s from my diet) and I’ve had cramps on and off for a while, like I’m about to get my period but it never comes, I also feel really angry a lot. I’ve taken a test and it came back negative, I’m going to take another one, do you think there’s a chance I’m pregnant? My periods are never ever late, or is it all in my head? Feel like I’m going crazy haha! X