I did my first blood donation four months ago and before my hematocrit was 54(tested at the blood bank). Two months later it was 47.5 (tested at Quest). Today I donated blood again, four total month from my last donation and they(the blood bank) tested it at 55. Is there any reason why they keep getting a higher reading than Quest? Maybe I didn't have enough fluid. Today I did it late in the morning and had not drank any water only coffee.