Terry, Many good thoughts so far. I'd like to add that for several months after my surgery last winter I had bouts of crying for no appearent reason as well.
My hubby would try to help me "reframe" by pointing out all the positives in our life compared to a few years ago-to no avail. I think 2 things were in play for me at this time. 1: A reaction to coming off the anesthiesa and pain meds. 2. After the adrenaline of the phyisical pain and emotional anxiety of illness had subsided I released the emotions that had pent up during the crisis. Maybe this is the case for you.
I'll give you an example of my theory: I have a relative who had two babys (only 16mos apart) who were born with a rare disease similar to muscular dystrophy but advanced faster and more severe. She cared for them at home (along with 2 other healthy young children) as long as she could but at about age two they had to be hospatilized. For 7 and 3 years respectivly she watched them both suffer terribly and die. All during the ordeal she remained an active JW and devoted wife and mother. However, AFTER the crisis she had a complete nervous breakdown with non-stop crying. While we HAVE to be strong we usually are. When it is safe to unravel then we do.
I have a hunch your crying will lessen over the next few months as you gain your physical strength and purge the residue from the meds and stress
my 2 cents