Shah - I think you're dealing with a lot more than just clutter - you sound depressed. You've already been insightful enough to realize that the end of your marriage is when these hoarding behaviors began. You mention you've been diagnosed with OCD, but that might be secondary to depression. I'm not sure what med your doctor prescribed, but there are many out there to try, and sometimes it's a bit of trial and error until you get the one or combination that works for you (btw, I'm not a dr., but do work in the pharmaceutical industry and in the central nervous system (depression, ADHD, schizophrenia, etc) area. Do contact your doctor again and don't give up on meds yet.
In addition, I think you need to seek out a therapist before you hire an organizer. The clutter is a symptom of your emotional state - take care of yourself and I think you'll find the clutter issue will resolve gradually. It took you 3 years to get to this point, so don't expect to unclutter overnight. However, when you begin to feel better mentally, I think you'll find you have more energy and ambition to tackle the clutter.
As with the meds, it may take a few therapists before you find one with which you "click." Good luck and don't give up - you've already taken the step to recognize you need help - now follow through and get it so you can live the rest of your life!! Keep us posted!
