I’m 21 years old and I live in New York. I always get canker sores in my mouth and they are extremely painful?

I’m 21 years old and I live in New York. I always get canker sores in my mouth and they are extremely painful, especially the ones I get. Sometimes I even get them under my tongue but it is very rare (I am bi but I do not give head to other guys…usually the other way around LOL). 99% of the time I get them on the inside my mouth behind the lip. I do the mixing with the salt water thing, but I don’t do it frequently. I don’t mind the taste. I just don’t know if it is that effective that’s why I don’t do it frequently. I bought Anbesol from Wal-Mart. I apply it multiple times a day but it doesn’t num the pain as long as orajel does but the reason why I don’t use orajel is because it didn’t seem to be working the last time I had 2 canker sores in my mouth at once. I was using it for at least week before I decided to go to Wal-Mart and buy Anbesol. I have been getting canker sores since I was kid. I still get them as of today. I don’t know what else to put on this thing to get rid of the pain. Once I get a rid of a canker sore, I can go a good month or two before another one will appear. Anyone who can recommend anything, I would love to hear it. I drink about a 2 liter of a Pepsi a day. I want to stop drinking Pepsi. I drink way too much of it. I can’t seem to get away from it. I’m so addicted to Pepsi. If someone has a suggestion to get me to stop drinking pepsi, please tell me.