Intermittent chest pain lasts 5-10 secon

I am 39 years old & 76 KG weight. 5.5'' Height. I am into software career. for past 4 months I have Intermittent chest pain that lasts for 5-10 seconds or more. Feels a bit squeezing. Visited Manipal hospital & got TMT test done (4 months back). Doctor said its normal & suggested gastric control tablets.Sometimes heart rate increases & upon rubbing against the chest normalizes. Have been to Narayana Hrudayalaya for basic heart checkup. Found Sugar levels/BP/Cholesterol to be normal or below high levels. But heart rate was found 140 (two weeks ago) which they suggested Thyroid test. My Sleep is normally 6 hours average but sometimes its 5+ hours. I become very restless with anxiety bcos of this problem & feel very insecure & restless . I don't smoke or drink. Don't eat non veg. I was having some beer every week but stopped it 6 months back. i have been looking out for employment last year which added to my stress levels. I am doing small walks daily which makes me feel better