Can pain be in mind. Help me asap!

Please help me its killing me. I was having lower abdomen pain than few days later mild pain  penis started a bit than after that i went to the doctor he checked and prescribed me tablets Metrogyl-400 Spasmodart Rantac-150 so after that my pain reduced but i am very much consious about my penis so i think a lot and analyse myself too much like is penis really paining i pay close attention wether i am having burning sensation in the penis or not and so on.. Sexual history- I have only been with one girl in my life till now and she had boyfriends earlier but she only kissed them and that's true i know it very well and as a preventive major we have done hiv and vdrl test for both which came to be negative for both of us  So my real question is can we have sex and is the problem due to my overthinking Please help me ASAP!!