Personally, I wouldn't think it's too much to take her for a short ride so long as you don't do anything too strenuous.
Also, I got to thinking, are you sure that the pus-y looking stuff that came out was actually pus? Healing wounds get a concentration of white-blood cells in them that can make a fluid that looks very similar to pus, but it isn't infection. Best way I've found to tell the difference is to smear some on a finger and smell it. Sounds nasty, but the healing fluid won't really have much smell. The infection, well, there's no mistaking that LOL.