I'll try to keep this short, but bear with me. I've been with my wife for almost 20 years and she has been my ONLY sexual partner except for 1 encounter I had a few years ago (stupid, I know). I panicked after that one instance and got tested for STDs - all came back fine except I was told I came back positive for ureaplasma. The doc said it's very common and that I could have had this for years - it's possible since my wife had a few sexual partners before we met. I was very worried I just contracted this, but I guess we'll never know. Anyway, doc said no need to treat ureaplasma if it's not causing symptoms.
Fast forward a few years and I've got an infection from ureaplasma that my doc will be treating with antibiotics and he suggests my wife also get tested and treated since we're in a monogamous relationship and she probably has it too. I'm terrified she will test negative and I'll be caught, but what are the odds of that, considering:
1) She may have given it to me in the first place
2) If she didn't have it before I picked it up a few years ago, she must have it by now since we don't use protection, right?
Am I worried for no reason here?