Suggest Cause And Remedy For Pain In The Breast

I have a cavity new cavity in the back of one of my front teeth , I have put of going to the dentist it has been getting bigger and over the last 2 months have been getting like stabbing muscular pains on left side of the breast could these be related .I am a female 50 my mother died of a heart attck attack at 43. I will go to dentist now but am worried about these pain in the breast area. Do I need to go to the doctors or get tooth fixed first I am scared this might be more