A few nights ago, I had unprotected sex, and used lotion as a lubicant. the following night i had a "dry-hump" session and my friend and tried masturbation, but there was no lube! since then, the head of my penis looks red and swollen and is slightly painful to touch. There is a constant discharge and its been almost a week..should i be concerned? i think the discharge may be from the lotion, but im not sure from about the pain...