possible pregnancy symptoms?

Hi everyone. I'm 17 and my boyfriend and I have sex on a pretty regular basis. Either every day or every other day usually. We use a condom every time and he used to check them afterwards but lately he hasn't been doing that and in his past relationships, the condom broke quite often. I haven't been concerned until recently. I'm not due for my period for another week and I'm very regular. It's always right on time and I expect cramping the day before and the day of. I haven't experienced breast tenderness before my period but for the last few days they have been too sore to even touch and I have had cramping in my lower stomach and it seems too early for me to be cramping from my period. Is there any possibility of me being pregnant or am I just being paranoid. Please reply. Thank you.