With your complains you seem to be suffering from submucous fibrosis .. do you have reduced mouth opening too ?
Because it is progressive condition u may suffer from it even if you have stopped eating gutka.
Next Steps
you must not take it lightly as these are precancerous in nature. visit an experienced Oral Medicine specialist immediately.
Health Tips
Remember there are many conservative medicine options available nowdays ..if you visit early you may avoid surgery as well ...