What causes dull cramping discontinuous chest pain?

Hi doctor,

I am 37 years old and normally take Hydrochlorothiazide for diastolic blood pressure and Zebeta for S node dysfunction. I am also on Metformin. My HbA1c is 6.1 percent.

Two days ago, I started experiencing dull cramping chest pain that was not continuous. I went to the ER and all the tests came back fine (chest x-ray, EKG, and blood work). He did not know what was the cause of my pain. They gave me Nitro pill and Nitro paste on my chest which decreased the amount of pain. Upon release, my blood pressure was 101/55 mmHg, and my pulse was 61 beats per minute.

I had not taken my pills on the day this occurred or the last two days. It has been running around 104/63 mmHg and pulse 69 beats per minute. My diastolic BP without medicine usually runs around 95 mmHg. My resting heart rate was 140 beats per minute before I started medicine, so this is a huge change for me. These are not new medicines either. I have attached all my test reports for your reference. Please guide.

Thank you.

Hi doctor,

Thank you for your reply.

I am sure it was not acidity, as I have a history of GERD and ulcers before. It felt nothing like what I expected in the past. I worked a 16-hour shift and came back at 6.30 in the morning and this started at 9.30 at night. My blood pressure was 110 when I was working at 4 AM.

Thank you.