I had a couple sleepless nights in my bed and now i am unable to fall asleep in my bed but sleep ok in another room. how can i retrain myself?

Short Therapy: Your best bet is actually a very short course (usually 6 sessions) of cognitive behavioral therapy ... This has been proven time and again to work in these types of symptoms. You can ask your family physician if they have a doctoral-level psychologist in your area that they might recommend. Or, most psychiatrists will be happy to give you the name of someone. Hope that helps!