One time I had trouble donating blood because it kept trying to coagulate in the tubing on its way to the bag. The nurse impressed upon me that this is what happens when you don't drink enough water before donating. And they press liquids on you afterward as well.
Yesterday I may have just overdone it a bit in the other direction. The blood came out really easily and filled up the bag very quickly. Then it just didn't want to quit. Last night I stopped drinking water in an effort to get back in balance.
I'm just waiting until my G man is here (soon) to take the bandage off and see if it is still leaking.