If you think you will gain by going in the hospital then do what you think is best for you..
I know I get those thoughts , that I am going to go insane, and things don't look right, etc... You have gone for 6 years like this, that is a long time to suffer. The thing is for me , I know that detached feeling and it is awful, but when I think about it all this time I hadn't gone nuts, My therapist says it will never happen, that I couldn't will myself crazy it isn't in my make to go psychotic, and too old to be schitz... so here i am , anxious/depressed, dp/dr OCD what a mixture but the less anxt the less ocd , the less anx the less depression DP/DR. I notice the busier I am the less I have time to ruminate...with out the Ruminating hopefully I can reset my brain to do its own thing.
Sitting there thinking about it only makes it worse, we can't control our thoughts no one can... think back to when you did feel normal, did you try to stop yourself from thinking about certain things, You probably had some of the same thoughts pop in your mind, but you never gave them power to scare you.
Have you tried excercise? Even walking.... What is one thing you really love to do. Was there a hobby you enjoyed when you felt normal... Try doing it again, getting interested.
If you think that the hospital is the way for you then by all means go and get treatment... You have to decide what is going to be good for you. If I could tolerate the meds , I would have taken it for comfort so I could deal with the issues causing this feeling.
There is something I heard from someone. What we resists Persists. So if we constantly fight these symptoms, they will stay. I believe and i will say again , I believe that when I can totally immerse myself in other things and loose the self monitoring , I feel better. Now if I can just keep stringing that together and eventually have more time immersed in life that I don't monitor my every thought then I think I will be well.
So you in the end it is up to you it is your life.... Take charge of one little area at a time.... To med or not to med, to go into hospital or not... Make a choice and then let go and let it happen. It is easy to say , I know because i am struggling with it..