Hi Doctor, I Am 27 Yrs Old Nn My Period

Hi doctor,
I am 27 yrs old nn my period start on 20th of every month. In last month (on October 20th), we had a gentle sex for few seconds and he pulled out without having ejaculations. Then we had protected sex a week later. Now it's already 25th and my period is 5 days late...I don't feel/see any symptoms but a stomach pain in evening/night from two days. We are sure that he didn't cum. Please advice me as I am not prepared for baby right now and have some other priorities. If there is anything which can confirm me that I am pregnant and also advice me any medicine if it's an early stage and it wouldn't cause much problem.

Please guide me, I am very worried and it makes me cry all the day. :(