Arthur, as a XDAM, i'd say forget any mixed messages about the 3rd date, dont dwell on it too much. she wasnt feeling well, and wouldnt be herself. but she did pick you up and you got to see her when she's not at her top self. that took guts for her.
dont think too much into how soon to call, DBing, etc. Ever see the movie Singles? the whole waiting 3 days bit? go with your gut, think about how you'd like it to be, then make it that way. Dont play the games that got us here.
of course, you dont want to be like the bit in Swingers where the main character was trying to leave that message with the girl from the bar - not good.
If you're confused, be honest with her. ask her if she wouldnt mind leading for a little while until you learn her groove. Tell her you want to be a gentleman, and dont want to make the silly mistakes of over-analyzing because of self-doubt. Let her know that its ok for her to say no, its ok for her to say yes, you'll understand and will work with her.
create the habit of open communication, nows the time to form the habits of a good R - YOUR habits. If not for this woman, then for the next.
this is what i've learned for myself.
"In a ham and eggs breakfast, the hen is involved, but the pig is committed".