Suggest Treatment For Pain In Cheek And Upper Gum

I m having pain in my cheek and upper gum, inside the mouth where they meet. If I touch the outside of my cheek and apply slight pressure it s very painful. I have a very hard time eating anything due to the pain in my mouth. I have a tooth 3 teeth back from it that is broken but that s not the area hurting.. If I touch the inside of my mouth along the upper gum line and press on it, it feels like a rock under the skin, I ve been using over the counter mouth pain meds like Kanka but it doesn t numb it up enough to give me relief. Also, I have no insurance and really don t have extra money to pay for a dentist, as I m a single parent who s every penny goes to supporting my boys and myself as I m the only adult in the house working