Honestly dude, do everything yourself. Having your girlfriend, mother, sister, friend, whatever do stuff for you is just going to hold you back even more. Now, I don't know how bad your stutter actually is, I've only got a mild one myself, but the fact of the matter is if someone on the other end of the ordering phone (whatever, lol) cannot wait an extra 30 seconds for you to hear your order and for them to process it, then they are not a very nice person and they shouldn't be working serving the public anyway. You ARE a paying customer and you DESERVE to be listened to, regardless of the situation. Stay strong and do everything yourself, it may take a little bit longer, but knowing that you've done it yourself will make yourself feel a lot more accomplished.