TTC with my husband

Hi I'm a mother already to beautiful five year old daughter. I recently got married in March to the man of my dreams and we really want a second child especially because he has none of his own. He went off to the Army quickly after we married and we have seen each other once since may. Last weekend was our first time seeing each other and doing the do. When did the do I was off my menstrual for only one day. Is it possible for me to be pregnant?