Anxiety over a mistake -STD?

[Bwest859513]

I messed up 2 weeks ago and received unprotected oral (I am male) from a female for about 5 minutes and then I ended it. The very next day I had sex with my serious girlfriend and instantly started to feel a burning feeling in the tip of my penis. The burning feeling has come and gone for the last 2 weeks.  I'm so scared that I got an STD that I believe I am creating these feelings and pains up. I think about it everyday, 24 hours a day and can't sleep. I feel so bad because of what I did and it's really killing me. I have no real signs of an std other than the burning and I currently have a pain in the side of my penis. There doesn't appear to be any discoloration, no bumps, no discharge, etc. just the burning and pain which really just started today, 2 weeks after the fact.

Do you think it's my anxiety causing this?

[Kre67a]

I think you should go to a doctor to be certain and ease your mind, which should ease your phantom pains, if that's what they are. Then level with your serious gf. You are human, you made a mistake. Hopefully, if she really loves you, she can forgive you and the 2 of you can move on from this. Putting this episode behind you should ease your anxiety.