Hi. Yesterday And Today I.ve Been Experiencing Some SOB/DOE. I

Hi. Yesterday and today I.ve been experiencing some SOB/DOE. I am 69 yrs old s/p a L Mastectomy followed by chemo which included 1 yr of Herseptine. I recently had an echo (Jan) which was wnl. I am now also experiencing a pressure in my chest but o pain. When I recline the pressure is in my head. I am leaving for vacation tomorrow for a week and, although, I don't think this is a true emergency; I am thinking of going there before going out of town. Thoughts??