Hi RA, as most of us know, we can't give medical advice here, but I would inclined to look a little further into the SSRI stuff. It sounds like your brain chemistry is changing? And this is causing a thought process that you are having difficulty controlling.
I only mention it because I take an SSRI as well and for a period of time this summer I started to forget to take it in the morning, and after about 4 days I had some strange things going on and I didn't know why, and then it dawned on me that I had been forgetting to take my morning medication. I drove straight home and took it, and within 24 hrs was back to "normal".