Am I just paranoid?

[Doingmypart]

So 4 years ago my W had a one time sexual encounter (she says & I do believe her) with a colleague. He works withing walking distance of her office and they have had a "normal" working relationship before this. BTW I have known of this affair later in the year that it happened. At the time learning of it brought us together and we decided to not talk about it again once we decided to stay together. It was my understanding then that they would no longer work so closely and communicate less. Fastforward to about a month ago. I needed to get some more info and hopefully closure on this topic. So I asked some questions that had been in my head.
Found out they still talk and work together from time to time & that they never talk about what had happened and that it is as if it never happened between them. He is married w/kids too. Again I believe her. However, I have access to her cell records so one day I just looked and found out she talks to him fairly often. Lately I have been checking her call log on her cell and just about everyday they call eachother.
Currently we are going thru probably the worst time we have ever been thru in the past 8 years. I am fearful that she is going to him for Emotionnal support or somthing like that. When our "mess" started last Sunday, I actually said I don't think either of us should consult opposite sex friends IE "that guy from before." Funny thing is she did not really agree or say no to that. So again, I may just be paranoid about this...I feel like a stalker checking on her call logs etc, but I really want to make us work and so does she. So my real question here is do I share with her that I have been looking at her phone logs etc? Do I stop doing it? Revisit the conversation about the affair again? Unfortunatly my gut tells me there is something going on, but at the moment, I don't trust my gut as life seems to be in a bit of a tailspin!
Thanks to all that are here & respond.