Lots of kissing, rubbing, touching, etc. 

I’ve read this forum and believe low to no risk, and based on this went on with my life and had sex with my wife. 

However, I would like confirmation as I went back to having sex with my wife. She said she is having some itchiness and D is-comfort that occurred shortly after after we had sex 3-4 days ago.  She does not think it is a yeast infection but due to her getting older and dryness (we are both mid 40s).

I do not have any symptoms, no fluids, pain when peeing, nothing. 

Anything I should be worried about?

Also, I say no symptoms for me. I have some discomfort but I believe that to be due to mental stress as you have discussed often. 

I have nothing obvious unless I go looking for it. 

You describe a sexual event with little or no chance of STI transmission. Oral sex is not risk free but quite low risk for all infections. (Cunnilingus -- oral-vaginal contact -- comes close to zero risk.) And although you say nothing about your co-worker's sexual lifestyle, most likely she is at low risk. (Even if she has her own non-marital sexual experiences, if those are like this one, she is unlikely to have any important STI. As for your wife's symptoms, vaginal area itching is extremely common in entirely healthy women and is unlikely due to any STI. And she is exactly right about such symptoms becoming increasingly common as women age -- if the problem continues she might discuss it with her gyn, perhaps expecting to learn she's getting low on estrogen as she approaches menopause. Finally, your absence of symptoms also is reassuring -- despite "some discomfort" that you attribute to stress (probably correctly!).

From a medical/risk perspective, I see no need for either you or your wife to be tested for anything.

I hope these comments are helpful. Let me know if anything isn't clear.

HHH, MD