First of all, I am not an
First of all, I am not an expert on frostbite (I am just going based on my personal experiences), but I have found a very helpful site for all those that are interested.
http://symptomchecker.about.com/od/Diagnoses/frostbite.htm
(not sure why this this is not showing up as a link)
But YOW the jist of your concern is this, it could be a combination of both. Blistering from minor frostbite can take up to 48 hours to show up after your toes defrost, so keep an eye on that. Check out the link, you will note that swelling happens (I had that last week as well).
My biggest recommendation is, if you think you have frostbite, let your feet (toes) heal fully before you try to run barefoot again (or if you are unsure it might be time to pack it in, damage is permenant), you are causing more tissue damage if you do not allow it to heal properly. I had very superficial frostbite the other week, and it took 5 days for it to heal properly, and I still waited another 4 days before I tried again. I like my toes and I want to keep them (running barefoot without toes would look rather funny, I think).
Its better to be safe than sorry.