hi and welcome back Day1ncounting
I wasn't sure what Pure O was so I had to look it up.
I would not give up on finding a medical professional who might be able to help.
I can only add some common sense that, if you'd done anything really bad, you'd know about it 2 and a half years later.
I know how hard it is to forgive yourself (and I don't have any OCD issues) - but I try to live my life right now as a kind of living amends and I have managed to let the shame and guilt go.
I really hope you can too
D