What do I do?

I was just diagnosed with herpes a few days ago. I am still emotionally a wreck, but I know now that I was not as careful as I thought I had been.  I was with the same person for four years, and I have been tested for herpes numerous times and it never showed that I had it. While we werent together I had 3 partners in which 1 I can't remember if we used protection it was so long ago. But the other 2 I know that I did not. There is a four day period of time where I had sex with my long term partner and with someone else and now I feel stupid.  Is that a feeling that everyone goes through?  I feel almost like because of my actions and lack of respect for myself I may have ruined my chances to meet someone nice and too have children.  I feel as if maybe I failed myself a little.  Can someone help me maybe with someone to talk to I wont seem so alone.