Jasonsweets, I feel your "pain." Not to make light of your situation, but is there a way to determine if it's alright that you up the dosage of your insulin yourself? Meaning, has your doctor given you the go ahead.
The best way to tell if you are using the right amount of Lantus will be your a.m. fasting number, 9-10 hours after you have eaten. If this number is within the 70-110 range, you are using the right amount of Lantus. My a.m. fasting numbers were between 250-300. I was started out at 18U of Lantus to see if this would work. My doctor would up the dosage AFTER I called him to let him know my a.m. numbers were not coming down.
Insulin shows an immediate affect. BUT, Lantus does not lower your BS when you eat carbs.
As others have stated, Lantus is a basal insuiln that works 24/7. It has no discernable peaks or valleys. Most doctors start out the dosage of Lantus at the lower end of the spectrum. It normally depends on a person's weight and gender and, of course, your blood sugar numbers.
Your numbers are high after a meal. Obviously, carbohydrates and the amount of carbs you eat affect your blood sugar.
Lantus does
NOT lower your blood sugar if you eat carbs. If you see a pattern of your blood sugar rising after a meal, you may need a rapid-acting insulin that you take with meals. Humalog and Novolog are two of the rapid-acting insulins.
I take both Lantus and Humalog. I have the same problem of my blood sugar rising dramatically after I eat carbs. The Humalog I take prevents that from happening.
I cannot say, as I am not a doctor, that you should self-medicate. Please talk to your doctor as soon as you can. As I said, Lantus does not lower your blood sugar after you eat. A rapid-acting insulin is designed for this.
Invest in a carb-counting book such as "The Calorie King". It comes in pocket-book form and is also on-line. You need to count your carbs carefully even when using insulin. It's the same for any diabetic no matter if they use meds, insulin or diet alone.
I would recommend that you DO NOT up your dosage of Lantus until you have talked with your doctor. This is not a safe course of action. Limit the amount of carbs you eat at a meal to prevent your blood sugar from spiking as it does. Each person is different in how many carbs they can eat at one meal. Some meals I eat less than 30 per meal.