I would definitely email her if it is eating you alive. I feel ashamed and disgusted when I open up, even if my therapist gives a response. One session I opened up about a horrible time in my life, and the shame backlash that hit a couple of days later was awful. It took me a couple of weeks to email him about it, but it helped a lot. Let her know that she left you hanging and you're uncomfortable with it--If she's a decent therapist she won't get offended or criticize you, and she will discuss it with you at least at your next session, but hopefully a little bit over email immediately. Believe me, sometimes they are completely oblivious to the fact that something is bothering us, so it's probably something she just missed. But it might be better to get it out there so you're not sitting in your shame and disgust for a week. I know it sucks to deal with!