I can't really say whether or not you should go IP simply because I wouldn't want to persuade you one way or another because I'm far from a medical expert and I know that you are struggling and have been for ages.
So I just thought I'd simply let you know this - IP has been positive for me. Yes, maybe they will change / increase meds, I don't know. Or maybe they won't? Either way, regardless of what they were to do if you went IP, doesn't mean it would be the same meds once you are out of IP.
If you don't go IP, my wish for you is that you find a sense of comfort soon.
You have suffered long enough