Rose, you have been through a major event in your life. Losing paperwork like that would be pretty normal considering what you have and had been going through. Focus on the fact that you thought about needing to get that blood work done as that's a sign you are improving enough to think in the now and about moving forward.
It's GOOD/EXCELLENT that you did what you did yesterday. It means you are moving in the right direction. Remember, even just thinking about your needing to get that bloodwork done is GOOD, it's progress. Try not to see things as a mountain, but that you are focusing on the path itself one step at at time.