My husband cheated on me...he used a condom, but am I still at risk for STDs?

Q: My husband cheated on me...he used a condom, but am I still at risk for STDs?My husband just admitted that he cheated on me a few years ago. I know that after he did, I got some type of infection that the doctor cleared up with medication. He said he used a condom with the other woman. Could he have transmitted an STD from her to me even though he used a condom with her? Second, I might leave him...how long should I wait before having sex with someone new?