Hi, Im A 32 Year Old Female. I Recently Felt

hi, im a 32 year old female. i recently felt sharp pains in upper chest (more left side than right) on few occasions. i recently started doing daily exercise where i would also be left short breath even when im walking 5minutes. my joints and muscles are sore also. i want to get fit again after given birth couple yrs ago so i can rejoin the workforce. i feel lazy / unmotivated at times due to above symptoms, trying not to overdo myself. im currently on no medication and not sure if any vitamin supplements or weight lose will help me achieve my goal.