Behind chest back pain. Kindly help me.

Hello sir kindly help I am very nervous kind of person 1. Left upper back pain when sitting . Pain immediately goes when I lay down. 2. Some time left shoulder pain. And sometime upper arm pain. 3. Very mild pain feeling in left arm finger if I think about it. 4. Normal pain happened in left arm 45 days ago and I went to cardiologist and he done ecg (low t wave v5), echo (normal), tmt (negative). 5. I always think about heart attack if mild pain occurred. Have intrusive thoughts about heart attack Today on 07 dec 2023 I have bad left shoulder and upper back pain and mild pain left upper arm I went for ecg. It shows abnormal q wave (III). Picture attached. And was high bp 6. 7. Left chest upper nipper area near centre pain comes and goes. 8. I don't know what is happening with me I am getting nervous always. Kindly help me.