Hi there ~
I understand your concerns. If you have patches in the inside of your cheeks it is probably leucoplakia and this is a self healing condition. if it is hurting then you may need to apply local creams and please consult a dermatologist
for the prescriptions. I also suggest that you cut down and eventually stop the usage of tobacco as this can result in mouth cancers. I believe you have good reason (family issues) to stay healthy and it is your responsibility to take care of yourself and your family. Consult a doctor as soon as you can as well as a psychiatrist
to go off of the tobacco and ways and means to be able to do so.
I hope this helps. Take care and have a lovely day!