I have pressure and minimal pain on the left side of my chest sometimes. What is this? I have type 1 diabetes but it doesn't seem to be related to bs

Have it evaluated. A person with chest pain needs to be evaluated and treated appropriately. Multiple possible causes may be: heart attack, esophageal reflux, anxiety, musculoskeletal, pneumonia, pulmonary embolus, and aortic dissection. Have it evaluated right away to prevent potential serious complications.
Unsure. Dont know the cause. Best to see your doctor. By the way. Why arent you on an Insulin pump?