Upper arm and toothache helpppp!?

my upper left arm feels funny the past few days; like, almost weak, maybe the word is? not sure. almost lke how your legs feel when you're hungry and have to walk a lot. also on the left side. ive been having gum & tooth problems and it's recently gotten worse and like my jaw hurts on that side too. is it something to worry about? seeing dentist soon for cleaning as recommended at last visit, also.