False Memories

I am having constant false memories that I know cannot all be true. If all my memories are true, I would be suffering major consequences. I have also asked people close to me if the thoughts I have are true and they assure me that they are not.I have memories of myself doing or saying terrible things. IF I had actually done all of these things, those who are close to me would have seen or heard about it. These thoughts keep intruding throughout my entire day and lead to headaches and extreme anxiety.

I have ocd and went through cognitive behavioral therapy to stop my compulsions. I do not constantly check doors or redrive routes in my car anymore. Still, I cannot get passed these thoughts.
A few years ago I made a few mistakes where I lost my filter and said things I shouldn't have. I am wondering if guilt surrounding this is what has caused me to have these false memories. I am at the point where I do not know what in my past is real and what is not.
How do I get passed this?

I have had dreams that seemed very real and left me shaken for days. The line between waking and sleeping was blurred. These were frightening times and I lost trust in myself.
I would discuss this with an appropriate professional. Has there been a recent med change? Have you drank alcohol more lately?

Asking for reassurance can be a compulsion too, I'm not saying don't do it or anything, that's none of my business, I'm just highlighting that.

It sounds like you found the CBT helpful, what do you think the CB therapist would say?

Maybe something along the lines of..
What evidence have I got that these memories are real... any?
If they are real, what's the worst that could happen as a result and how realistic is that (am I catastrophising?)
If there were consequences, how would I cope with them? Who would help me? What have I already learned and faced and overcome that would help me overcome this in turn?

What do you think?