Thank you for that additional information.
from what you have posted I believe your pale gums and nail beds are secondary to your underlying blood issues.
This might be a sign of poor circulation and, as such, could cause problems with the perfusion of your major organs (brain, heart, kidneys etc)
So. What should you do?
I am glad to hear that there is no sign of bleeding. That being said I feel you should consult with a hematologist just so as to be sure that no stone is left unturned....
Your pale gums after exercise are telling you that something is wrong with your circulation and it is up to your doctors to figure out exactly what that is....
Does this make sense to you?
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Dr. Rick MD FACS