Welcome to the Forum!
I am sorry to hear that you are discouraged. I do not take Humolog as a fast acting insulin, currently I take Novolog. Therefore, I did do a search on
side effects of Humolog and found this; "Other side effects include swelling of your hands and feet, low potassium in your blood (hypokalemia), and weight gain."
Have you talked to your doctor about changing your fast acting insulin to something else?