I think you need to let it go. It is causing more angst for you than anyone else.
Two points I would take from what you wrote:
* In the future with M you can't assume she's going to pay attention to all of the details and you should have a concrete agenda for future conference calls. After the call, type up the notes and send them to all participants with next steps. If not all of the questions are answered everyone knows what info you still need.
* Don't bring up feelings next time, even though you are right and I see why you are feeling like a ball being tossed around.