Re-occuring chest tightness/heavinessi have asthma / age 24, what to do?

See a physician ASAP: Without more details, you may well have uncontrolled asthma. That requires regular daily medication, not just a "rescue" inhaler such as albuterol. At your age, you may need to be evaluated for heart disease as well. See an internist first. If it is determined that it is most probably asthma, see an allergist/immunologist as well.