Reassurance isn’t reassuring after awhile?

I’ve heard it’s not good to seek reassurance or give it because it lowers your tolerance to uncertainty. But how do I avoid seeking reassurance when my thoughts and doubts are so bad, I genuinely just don’t know anymore if I’m a bad person or if it’s just OCD? I know I’m supposed to sit with the uncertainty, but how can I do that when the uncertainty has me unable to trust my own brain? Especially when the OCD is real event and POCD? How can I not seek reassurance when I feel so alone and so abnormal and just don’t wanna feel that way anymore? In turn, I see so many people on here struggling so bad and my heart breaks for them. How can I give advice to towers without giving them reassurance and hurting them in the long run?

Sorry for getting on everyone's nerves by reassurance seeking. I am just struggling and feel like a real P. I just want some help while I wait on my next therapy appointment

I’ve had physical compulsions on and off throughout my life. And rumination while not physical comes right along with it. Recently my brain has latched on to reassurance seeking. And it makes work horrible. I constantly feel the need to seek reassurance or validation from my boss or my coworkers or friends. I feel constantly judged and hyper analyze everything someone says to me or every interaction I have. I go home after work and run over all the times I spoke to or interacted with someone that day and I’m critical of how I presented myself, how I was perceived, what I said or didn’t say. I then go back the next day not only wanting to seek reassurance but also thinking I need to over explain myself to prevent any kind of damaging misunderstanding or miscommunication that would make them think poorly of me. Is this a common thing? It’s been the worst thing to go through as of late, my checking and things has gone down but this mental stuff is a whole new beast. How do you guys handle this kind of thing at work or at school?