Sorry to hear this...first off, dont freak until there is a reason to freak. I have experience with Leukemia. I didnt have it but my dad did. If they suspect something they will also probably need to do a bone marrow biopsy. Please dont get yourself so upset....it just may be something else wrong.
If you need any information about Leukemia FM me. I hope all the tests you need to have come back fine...