i'm sure you'll be able to do it. money was tight for us too, but we somehow always managed to make it work. ramen noodles anyone?
it also never hurts to ask your doctor if they have any free samples available. there were a couple of times that our re was able to give us free progesterone. i know when i got pregnant, we had abandoned an iui cycle several months earlier and i donated my unused progesterone and trigger shot back to the clinic to give to someone who might need a little financial support.