Thank you for your replies! I am really feeling encouraged now. I have been out bike shopping for a new upright bike (I have another thread about that). So far I have found a couple that might be ok, but I am still looking for "the one". I plan on riding some more this weekend.

Emily--your story sounds quite similar to mine, even the tailbone pain. The tailbone started acting up after the birth of my daughter, and while it is less painful than the crotch pain, it's not fun either. I still really like my 'bent though, and I don't plan on selling it, at least not yet. Your success with uprights gives me hope!