So I had a roundtrip booked awhile back and I requested an upgrade online. Then I had to change the ticket so it was re-issued. I realized today that the flight is on Friday and I should check my upgrade status since I'm 1p and the 72 hours had passed. Low and behold the upgrade request didn't carry over through the ticketing change and I stupidly forgot to request it. So I put the request in this morning, about 70 hours before flight time (using 500 mile certificates) and now it says I'm waitlisted.

What does this mean exactly? Are there no more seats? Is it possible another sweep hasn't been done so I could get confirmed in the next couple of days? Thoughts? Thanks!