I can tell you from first hand experience, you've definitely got bud rot... and yes, it DOES spread. What you should do here is cut out the rot completely (unless it's on a small bud, you don't have to take the entire bud off) and if you're NOT going to harvest, spray the area with a 1% hydrogen peroxide solution. Work on ONLY one site at a time, sterilizing your utensils between each site. Thoroughly examine each bud... if you see dead leaves on a bud, that's a site of bud rot - you might only see one or two leaves that are dead but that just means the bud rot has only just started there... Again, if you decide NOT to harvest right now, you will have to examine each bud minutely every day - because it spreads and spreads and spreads...
My recommendation is to harvest her as you will save as much of the buds as possible... otherwise, I can rather guarantee you that you will lose more buds as time goes on. And as you trim, KEEP examining the buds because sometimes the rot has started well before you see evidence of it but will show up by the time you get to the trimming...
It's been a bitch of a year for outdoor grows... but seriously, save what you can! Good luck!