Hello and welcome!
For one, it sounds like you've ruled out any kind of medical problem ith your doctor, so that's good..that's always the most logical starting place.
It sounds like you may be suffering from "derealization". DR and DP (depersonalization) are two common side effects of anxiety. If you search for DR here, you'll find a lot of info about it. The good thing is...while it is annoying and scary, it is harmless.
The best way to "fix" this is it to address any possible anxiety you might have. Ask your doc for a referral to a psychiatrist, who can start by evaluating you and coming up with a proper diagnosis. From there, he can discuss treatment options with you.
Also, you say you have OCD...has that been diagnosed? What are your compulsions? Have you seen a psych about that? If not, you need to address that, and that is likely where these new symptoms are coming from. Untreated OCD will leave you with a lot of anxiety.
Best of luck...update us!
It does not sound like this is solely anxiety. I would get some more blood tests...by the symptoms you described it sounds like there could be definately something else going on with you. Get your thyroid checked, check again for mono- cause actually this would cause all your symptoms, and make sure all of your viatmins are in check with a blood test. Start here...if your dr. isn't taking you seriously and keeps telling you to get more sleep then you need to get a 2nd opinion. Good luck to you!