Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

Best wishes.
I mean, if a tree falls in a forest and you're not there to see it fall, do you care if it squashed a chipmunk?
Okay you care. Bad example. But really: if your husband cheats and you never find out, did he cheat? Your world only exists from your own perspective. If something happens 'offstage', does it really happen? Does it matter if it happens?
Nobody is going to tell you when your husband is cheating. It's not a thing. Nobody does it. Nobody ever will. Those that do it, only do it once. That's because it's treated usually with disbelief and backlash. Some things we are left to find out ourselves, and that's one of them. If we never find out? Well and good. If we do find out? We have privacy!
Privacy is important! If you choose to continue with the cheater, you need your privacy. If you choose to dump the cheater, you need your privacy. And if the cheater decides to run off with that 19yr old student then you especially need your privacy.
So other women just won't cross that great divide. It's just not human nature. So you are hurt by a happening that could never have been any other way. And that is a hiding to nowhere. :)
Sorry. I don't mean to be mean. But I've been a bit bashed around by life myself and I have changed my expectations. So long as I have a job, a roof over my head, my cats are well and there's food in the fridge, I'm actually happy. I'm single, of course, but that just makes me happier. There is no reason for insecurity. No reason for fear.
When you find a way to live without insecurity you are very careful about bringing stuff back into your life that will destabilise that hard-won strength. i think you may have moved too fast for yourself, so the ground beneath you moves and destabilises.
Nod and smile at the other women. Learn the names of their children. As them how their mothers are doing. Chat about family. It's safe. When they get to know you, it will become secure for you to talk about more things. It just takes its own time.