It is hard. Remember that a lot of our worries of the future are based on our perceptions; past, present, and future. I always try to comfort myself with reminding myself it may not be as bad as it seems, it may be the seeming that is the biggest problem; you know how when you are sick you sometimes think you'll never feel well again? Then when you are well, you can't quite remember how bad it was to be sick, you can "remember" but not feel it the same.