
Katherine!!
I will try to answer as many of your questions as I can, however, I am no expert. I can only give you the benefit of my experiences. I have been on injectibles for several months. I don't know what the risk of multiples is, but my RE and I had a long talk about that and I believe most of them do not want more than two for any of their patients. They monitor and do bloodwork so that they can prevent that and will even cancel cycles that look like they may produce to many follicles (kind of like an egg sac, where your eggs grow). I do not have many s/e from injectibles. A little bruising, but it's very light. One of my big concerns was the needles. In reality, they are very tiny and you don't feel them much of the time after you get used to giving yourself shots (or dh gets used to giving them to you. For me, injectibles was the way to go, I have a lot more comfort and good results from them.
This is a very hard decision, and I agree that you should ask your questions to your re or ob/gyn. I even write mine down so that I won't forget about them!

I wish you the best of luck, and truely hope that this is a decision you won't have to make as you get a bfp this month!! If not, the girls on this site are wonderful as a support group.
Good Luck!