Avg. Blood sugar:Fasting 110, 1Hr post meal 156 (Max 235), 2Hr post meal 120 (Max 196). How much of a problem? I'm 152lbs. I eat 150g carb/45g sugar/day.

May have Diabetes. Your fasting blood sugar of over 100, but under 126, is in the Pre-Diabetes range. Your Maximum of 235 is likely to represent Diabetes (any random glucose over 200). I recommend you see your doctor and request a test called a Hemoglobin A1C, which is essentially a test of the average sugar load in your blood over the past 2-3 months. Either way, this needs medical attention and less sugar.
Diabetes? Generally any number over 200 can be indicative of diabetes so I would see my doctor and anticipate a lab order to check a hemoglobin a1c to evaluate for diabetes.