Hi Ebony,
I appreciate that you may not be confident at speaking up, I was the same once, but I find that the only way of moving forward in this world is by being assertive and standing your ground. By all means write down notes and take them along with you, and refer to them during your consultation. Mention that you have researched the 'pros and cons' of the insulin pump, and you think that you can stabilise your diabetes by going on the pump.
As always in any situation, be polite but at the same time don't be frightened to speak your mind, especially when it comes to your health.
Good luck
Nigel