l tried plain salt but it hurt like shit and my mouth went numb and l was drooling XD any other ways??

Honey.just some pain ol' honey has always seemed to work for me.

Go to your doctor, take the test so he/she can determine what type of ulcer you have.
Antibiotics will cure it in a week or less.
It came out about 10 years ago and l am surprised nobody seems to know about it yet.

l found that for mouth ulcers holding cultured buttermilk in your mouth for a minute or two about two or three times a day helps .