My Tongue Has Been Sore For More Than Two Weeks

my tongue has been sore for more than two weeks now. It seems to get better then ill wake up and it is like i cut it up with a knife or something. I have been keeping it clean and avoiding corse or rough foods, I have also been rinsing with peroxide 3% 2 times per day and it does seem to feel better after that or crest pro health oral rinse. Its still painful and I can't take it any more.