The wipe "ran" all night and all day today. I finally decided someting was wrong, there's no way it should take this long.
So I reset using the power and home button. It booted.....back to my original build! The wipe totally failed!
SO now I assume I need to backup my shsh blobs with TU, then I can wipe and restore to 4.3.3...correct?
EDIT: Also realizing my SHSH blobs were probably backed up by Cydia when I launched it. Gotta go learn how all this stuff works now since I haven't messed with it much in the past
EDIT2: Lucky me, looks like you can't get the blobs when the firmware has already expired...correct? I didn't see 4.3.3 in the list....so I checked off the option to request them from Cydia and boom! So far so good.