My girl friend missed her period by over a month, what do I do I need help?

I am 21 going on 22 i ve been with my girl friend for 9 months now but i admit I did not use protection and I used the with drawl method. Anyways my girl missed her period by over a month or more she said that her last period was in june. I took her to planned parent hood and they ran a test at the doctors office it turned out negative, they gave her morning after pill by she did not tale them right away. So far the only suspected sign of pregnancy is missing her period we are still waiting for her period to happen. I did some research on my own on the internet, and like I said she does not have swollen or throwing up, however she is kinda of overweight, we went through alot of stress this whole month nothing but trauma. We are not ready for kids i am 22 she is going to be 19, i just strongly hope that she is not pregnant it might just be overweight or high levels of stress that we experienced this month. I want to know if there is a pill out there that can eliminate pregnancy if she is pregnant in the very early stages? Id hate to do an abortion cause she might not be able to walk or have kids ever again. I know I made a mistake but i am trying real hard to prevent it now then later. I need help I need advise is my gf really pregnant or is it something else?