Welcome to the Forum!
Are you seeing an Endocrinologist or just your family GP. It sounds like you need to have your ISF (Insulin Sensitivity Factor) and ICR (Insulin To Carb Ratio) calculated, so that you can calculate your bolus (after meal) injections. The sliding scale method is old school and generally works
if you can continually eat 30 carbs or so for each meal.
Read through the first three threads in the Type 2 Section, when you get a chance, if you have not already done so. These threads will most-likely help you a lot. Self education is one of the keys to successful management of your diabetes, along with a healthy / sensible diet and exercise. Basically, diabetes requires a life-style change for the better. Good luck with your control and management.