Help me overcome my mistake

Dear God and to all those reading. I made the worst mistake of my entire life. Several months ago, shortly after my 18th birthday, I made the horrible decision to engage in Oral sex with another male. I do not know what I was thinking, I wasn’t gay and still am not. I grow constantly worried that I contracted HIV from this experience. I never did this again, and prayed every night since the incident for forgiveness and protection. I recently my girlfriend, and she is the most wonderful thing to ever happen to me. I feel awful that I jeopardized my life with this stupid decision, but if any harm comes to her It will devastate me. I love her very much and in no way am I looking to perform anything sexual with her.

I know what I did was wrong, but I didn’t know at the time, I can’t erase the scars of my memory, but thank you to each and everyone of you that even read this.