I was diagnosed with chronic esophageal inflammation, stomach ulcer and hiatal hernia. Will that cause chest pain L side? Card. Said heart was fine

Its possible. Depends on the size of the hernia. It also depends on the characteristics if the pain. Could also be esophageal spasm. Ask your doctor if an esophageal Manometry test is appropriate, and/or a referral to a GI doctor. Hope this helps!