You should let your rheumatologist (or whoever wrote the script for it) know that you lost a dose in that way. Otherwise you will end up one short, and may not get your next supply in time. With it being an expensive drug, they will probably be accounting for how many doses you actually get in a year, and if you don't let them know you messed up one they probably won't give you the extra to replace it. I'm sure they will understand. I don't think it really has anything to do with the pharmacist, as they don't write the script.

If you are still having problems giving yourself the injection, had you thought about asking a friend or relative to do it for you for a little while? Once the positive effects of it really kick in, it will give you a lot more incentive then to bite the bullet and just do it yourself. The other way would be to really try to blank out and not think too much about it - just go straight from getting it out of the fridge, preparing it and shooting without waiting for the "right moment".