Mouth sores? i think..?!

last week i got a cut on my tongue!.!. (i have no idea how cos i did not eat anything that couldv cut it eg!. crisps)!.!. it took about 4 days to heal and its not completely healed yet!.!. i got another one now!.!. quite painful!.!. on one side of my mouth, the gum got inflamed!.!. it pains when i floss!.!. (also when i brush)!.!. its now inflamed on the other side of my mouth and its quite sore!.!. now its on 3 spots!.!. including the tongue cut!.!.
(its not sores!.!. its just inflamed really bad)
what could be causing this!?!?
(i brush my teeth 2 or 3 times usually every day!.!.)Www@Answer-Health@Com

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