In the last book, Rand comes out of the Dark One's cavern before it collapses, carrying a body (his body - cause he is Morridin now with 2 arms, otherwise he wouldn't have been able to carry a body), and trips and falls.  A mysterious woman kneels and says, "yes, that's good, that is what you need to do."  All we know is that she is wearing what looks like Aiel cloth, and is old.

Is it the same lady (Nakomi) who approached Aviendha when she went to Rhuidean to become a wise one? She also mysteriously increases the amount of coals, like Rand lights his pipe without saidin or the true power.  Also what was she referring to, 'what you need to do'?

Wow, SadWoTreader, I just followed a similiar trajectory.  I watched the first season of the WoT TV series, and developed a desire to read the books again.  Though I had started earlier than you, around 1997 and read whatever books were out til around 1998.  Like you, I started right from the beginning and went through all 14 and also the 15th centered around Moiraine, in a matter of 2 -3 months.  Just finished today.  Then came on the community forum here, mainly to read other members' comments on the ending of the book.  I am looking forward to future seasons of the TV series, and I think coming on the forum here and discussing with others members helps.  Some parts of the plot at the conclusion could have ended better, but when I see other members in these forums voicing some of the same things, it helps.  I am contemplating getting into other fantasy series, perhaps from the co-author of the last few WoT books.  But yeah, my advice is to keep moving forward, whether its related to WoT (by re-reading the books focusing on different themes each time, contributing in the forums, reading other books by the author/co-author, keep up to speed with the TV series) or other hobbies/interests you may have.