21 yr old female been getting a sharp, stinging pain in the middle of my chest & slighty to the left at the edge of my breast. i have gerd. worryorno?

No worries: It may be your GERD flaring up, or it may just be a muscular pain.

Not particularly: You know you have GERD. The gastro-esophageal junction where most of the irritation occurs is deep to but just under your heart on the left. Sharp pain is often a sign of a flare & may increase with deep breathing or pressure over the area. Time to adjust your diet or meds.