Well you're in the right place to vent, we don't mind and we understand!!!!
Personally, I have found that a little mind game I play with myself can help sometimes when I get scared of things not working. I basically separate out what I can do (BD, track O, etc) and what I can't do (make an O or a pregnancy happen). I decide that as long as I am doing all I can to make a baby, then the rest is not up to me, but at least I can be satisfied with my own efforts. This was important for me because it helped with my feelings of failure. I haven't failed as long as I've done what I can!!! It sounds like you are doing that too, with taking EPO and planning an IUI and BDing a lot. So, good job!
I also have a SIL pregnant, just behind where I would have been with my ectopic, and a close friend whose pregnancy is just ahead. It is sometimes hard to see them pass their milestones while I am here flat-bellied and waiting. Life just isn't fair, at all....