Roughly 3 weeks ago I received oral sex off a stranger. I was very worried, and after a few weeks went to visit my GP. I went as I found a tiny spot near the top of my penis but my GP said that she thinks it unlikely that I have an STD, but said I should maybe get tested for peace of mind. She did however say that the tip of my penis looked red, but it should clear up soon - she also said this could be for many reasons (she even suggested she may have had a curry before). It is still red though, and feels slightly tingly. My testicles also hurt, but not on contact. Other than this I have no symptoms. I don't have any sores or discharge as far as I am aware. I just am very worried still, and really want to be able to forget about the whole thing. Thanks.