@contentandwell JK, I admire your proactive approach and your attitude! Keep in mind that sometimes tiny adjustments can help when having side effects, and you are right to discuss this with your doctor. Also, you have been thru a very serious surgery, and your body is still recovering and adjusting to that, even though you are feeling good. Your body is also getting used to those medications. So be patient, and be watchful.
I have found that I do not tolerate caffeine well anymore since transplant. So for me , that means only 1 cup coffee in morning, only. I avoid any caffeinated beverage after @ 3;00 if I want to sleep at night. Water has become my beverage of choice.