My due date for periods is 2 days away.i have severe pain in abdomen.does that make my chance of being pregnant to zero.as i was trying to conceive after my last chums

You'll have to wait and see what happens with your period. Many women will feel discomfort prior to their period starting, so it could just be from that. If you have been trying to get pregnant, there can be some cramping in early pregnancy as well. Chances are you will know one way or another in the next several days.