Your doctor is giving you very bad direction on this. Honestly, if he doesn't know about setting up the pump for insulin:carb ratios etc., you need to find another doctor.
There are four critically important settings on any pump, including the Omnipod, that need to be determined and set properly to handle boluses as safely as possible. These are found by going to Settings->System Setup->Bolus/basal/calcs->Ratios/factors/targets. These settings are:
- Target BG
Start with this between 100-110 to be safer while working out the correct values for all these parameters. Later, as you decide what your own treatment goals and plan are, you can dial this down a bit if you want. I target 85 now that I'm totally dialed in.
- IC ratio
This is the number of carbs that will be covered by 1 unit of insulin. For example, if you eat a meal with 40 carbs, and your body needs 1U per 10g carb to fully metabolize it, then your IC ratio is 1:10. However, the actual ratio is store inverted -- C:I, so you would enter "10" for this parameter if your IC is 1:10. Mine's 1:4.
- Correction Factor
This is how much, in mg/dl, a unit of insulin will lower your fasting BG. "Fasting" is important here, because while you're digesting, BG values will increase but no correction is necessary because you already took insulin when you ate based on the amount of carbs in the meal. The neat thing about this, though, is the pump does all the book-keeping and accounting for you, so once these numbers are all set right for your individual body, you can simply do a BG test before eating, enter the carbs in the meal, and based on any insulin still active in your system from a previous bolus, the current BG level, and the carb load in the meal, the pump will calculate the precise bolus dose to get you back to your programmed target within the timeframe of the next parameter...
- Insulin Action
This is how long exogenous insulin stays active in your system. With fast-acting insulins (humalog, novolog, apidra) this is generally set to 3-6 hours, depending again on your own individual reaction.
Figuring out what the right values are for all of these is an involved, trial-and-error process that a CDE familiar with the Omnipod system should guide you through over the course of a week or two.
Best of luck, and keep the question coming. There's no better place for solid, informed advice than TuD.