sorry to hear about your misfortune.. I'm all toofamiliar with icky blisters (and i've seen some gnarly ass ones from my friends who do pointe work!)
Having three is always fun..
Popping is the last thing you want to do (unfortunately your shoe did that for you already)
Things my friends and I use...
different kinds of medical tape. Does the job. Holds the skin together and keeps shit out. I've used a perforated medical tape as well, i dont know what its called however. Try looking at the drugstore?
another option is super glue. I know, sounds crazy but it works. too..
Hope your wound heals soon..