Could I be pregnant??

I was supposed to get my period yesterday and nada... I don't have that period feeling in my stomach today. I just feel super bloated and constipated but I don't have that dull period pain. My boobs feel heavier and I've noticed that I have been peeing a lot more then usual. I've been waking up twice a nigh to go pee. Is there any chance I could be pregnant. If so, when should I test??