What Causes Severe Pain While Yawning In Person With Breast Cancer?

I. Had breast cancer her positive . My lastchemo was 1 16. The past three days Iihave been experiencing severe pain that feels like an air bubble. It also happens right below my . Ollor bone both on left side. I keep yawning whi h is painful and ijust ccan tseem to cat h my bbreath. Should isee a dr or wait for a week?