Am I Pregnant

I had sex on the 9th and 14th cycle days 17&22 without a condom, I have a 28 cycle day, we checked for precum before he put it in and after he took it out. My period was suppose to come on the 21st but it hasn't, I also had a softball tournament last weekend. I've been waking up in the middle of the night hot and my stomach feels tingly. Could I be pregnant?