Missed this whole conversation last night, damn the time difference! Really sorry Ask, you're right, everything does suck. I don't think you have anything to lose by trying one more round at 100mg. It obviously did something and like you say, it's a hell of a lot cheaper than IVF.
As for the baby showers, I am 100% with you all. I haven't been to one since my nephew was born and I wasn't even trying then so it didn't affect me, but I could not do it now. I work at a university and sometimes have to deal with students interrupting their studies due to pregnancies - I barely even know these people and even that hurts. One of DH's friends (I might have said before) announced in April that his girlfriend since September had fallen unexpectedly pregnant. We saw them a couple of weeks ago and she strolled in with this lovely bump. Thank God it was sunny and I was wearing dark glasses... I tried so hard to ask all the right questions and give all the right reactions, but I found the whole thing exhausting. They're both such lovely people and I just end up feeling like such a bitch. My husband is wonderful and so understanding, but I think he does struggle to understand that side of things. So I try not to really say too much about it to him because I don't want him to think I'm some kind of jealous, evil woman!