these are good replies. budgie-panel --reset --replace &!
has worked for me twice (a kind user on this forum gave it to me) twice when the panel broke....warning: I lost all widgets, clock, date, start menu, widget order, and widget spacing. But getting the Budgie back was worth the 15-30 minutes of resetting stuff. Look at it this way: a new install could take a day to tweak the way you like it.
As for what SuperJC710e posted: I don't know what difference my exclamation point makes in my command vs. the one he furnished. Maybe it all comes out in the wash.