I have had this on and off for 60 years (and still standing) , particularly bad now with this awful winter. If you have really dark thoughts you can call The Samaritans who are here night and day. They have probably heard it all before - because you are not alone, many many people suffer from this especially at this time of year. For me it is if there is a glass screen separating me from the word - even as as close as the television. I've had hallucinations - visual and kinaesthetic, I just tell myself it's all an illusion. Try to live with it and let it pass, knowing that there are others out there who feel the same and who do care. Wishing you peace of mind