Use a tongue scraper instead of a brush. Makes a world of a difference. Two weeks isn't long enough to cure this, especially if you use marijuana. This will be a little longer at resolving but I believe you are on the right treatment. I would eat yogurt with live cultures and use Biotene rinse in a spray bottle to hydrate/moisturize your mouth day and night. Have the dentist look at your blisters to assess the cause. It could be something else that needs treatment. Remember, as long as your creating a dry environment (weed) you will be battling the candida. Consider using a different form of weed, capsules or eating it. Just make sure you're safe, don't want you overdosing. Consult a marijuana-savvy doctor before changing the way you use the marijuana. As for the blisters please call your dentist and have them checked to rule out oral cancer. Good luck.