The symptoms you said suggest you need RCT immediately.atleast u can do first step of RCT after which ur pain will subside..
Pain all over jaw and ear shows the infection is spreading and it's not a good sign.
If you are based in Bangalore come to my personal chatbox will guide you
Next Steps
start antibiotics like
1.Augmentin duo 625 twice daily for 5 days.
2.ketorol -DT twice daily or whenever pain is there
3.salt water gargle
Health Tips
1.avoid hot cold and sweet food
2.brush off any food getting lodged in the cavity immediately,don't use safety pin,you can also use toothpick
3.dont apply any balm or heat outside the face as it can cause swelling and pain later