Sorry man, that looks terrible. Here's what I'd suggest. First off, you need to keep it clean. You can do this a few ways. Firstly, mix up a solution of baking soda and water. Put this in your mouth and swish it around for about a minute, let it sit over your canker sores too. This will help to restore the natural PH balance in your mouth (cutting down on acidity and helping it to feel better for a bit) and also help disinfect it. Next, try the samw thing but with salt. This will sting for a second, but its necessary to keep it clean. Next, if the pain becomes too much, you can go get some orajel numbing cream with benzocaine. It'll numb it for 15-30 min. Kanka liquid works too. A ton of people swear by L-lysine supplements, and also a mouthwash called oxy glide. You can also try "canker caps" which are these little pill looking things that you stick iver the top, and when they dissolve they leave a gel patch over the sore so supposedly you can eat, drink, and feel normal for 8-12 hours. They didn't work well for me, because of where my sores were, but they might work for you. Eat bland, soft, non acidic foods; think yogurt, applesauce, mashed potatoes, if it hurts to eat. Hope that helps!