Not that big a deal, but still guilt

When my group leader implied that the group didn't like me, I was hurt. I left a voicemail saying I'd have to talk to the rest of the group then about this. Kind of sounded like a threat, I fear. So I emailed her apologizing and saying I would never cause harm to any group members (I only say "harm" b/c I feel like confronting is).

It's a long story. But sometimes I feel like I confess too much, little things that really aren't that big a deal, and then possibly get in trouble for that. It's like this moral thing I have, to always "confess your sins." I learned that young.

How do you stop compulsively apologizing and admitting "guilt"?

i do this a lot. yesterday i said something to a colleague that i repented.
staying away from people helps.
i try to restrict my humor to only 1 friend that i have.

earlier i used to mock people a lot. i dont do it now since not everyone is okay with humor.

As you say, you really don't have much to feel guilty about. In such cases it can be best to just keep these little things to yourself (as I think you recognise). I think using this space to let off steam/ confess can be useful. Or just keeping a diary.