I'm having squeezing in the left side, upper chest for a week now. they did ecg,blood work and x-ray everything was good. could this be angina?

Unlikely,given your: age.Any family history of Heart Attacks in mid-twenties? There are lots of things in the chest besides the heart that can cause discomfort.Go see a Board Certified Internist if this sensation persists and forward all hospital records prior to your appointment.See if 1-2 Advil (ibuprofen) helps for 3-4 hours.In my experience,in your age group,this will be musculoskeletal and may respond to Advil (ibuprofen).all the best..