I compiled a very similar timeline using a variety of sources. TA's journal material (in my list) comes from the Audacity site. And there is no "before." Just 'weekend bad; same as the week.'
This whole time period is intense for TA.
On May 15, an unidentified caller left a VM for TA (source is, I think, Paul Sanders FB site):
VM to TA from un-ID caller) Hey dude, I just got your message. Im so sorry. I cant even imagine how upset you probably are right now . Im so sorry. But I have to go to work right now, but Im driving to work, so if you can call me back real quick we can talk for a little bit until I, I get to work Im sorry but I dont have a lot of time but, dude, Im so sorry. And its gonna be okay though, all right? Its gonna be okay and youll get through this and its gonna be fine. So just give me a call if your and Ill talk to you later. Bye.
5-16 JA writes her "recognize me" message; that same day TA's journal says 'Mimi just wants to be friends.'
5-18 JA loses phone; same day TA writes 'worst weekend ever, same as the week.'
After the first time I read the transcript of this voicemail from the unidentified male, I wondered who that could have been. It had to be someone he knew more than casually or TA wouldn't have told him how freaked out/upset he was. This has only ever been released as a transcript (I think) so unless this person is following the case in extreme detail like some of us, he may not even be aware that the VM was still on the phone. If only it could be played, that person may recognize his own voice. Then, he could say for sure what TA had confided in him about. It makes sense it was just that Mimi only wanted to be friends, but even so it would be great to confirm that.