I Was Wondering If I Should Seek A Second Opinion

Question : I was wondering if I should seek a second opinion. I experience on and off chest pain (mild and seemingly random locations can be upper left, upper right, lower right, lower left but usually stays there for an hour or so or until I "stop noticing it"). I have periods of these intermittent pains flaring up every month or so and I'd say for a week at a time and then it won't happen until the next month. I have seen a cardiologist and was told it was just musculoskeletal pain as it was very unlikely I had heart issues at my age (25) and passed a stress test fine and my EKGs came back good. This is what was presented to the cardiologist in my case:
1. I am currently 240 pounds 5'11, recently lost 28 pounds and no drop in blood pressure (was high at 268 and stood about the same at 240) and a slight drop in cholesterol when losing the weight.
2. I have had high cholesterol since I was 13 years old (main reason why I am concerned with early heart disease).
3. My family has a history of heart disease with my uncle and grandfather both dying suddenly of a heart attack around age of 55 (one was very overweight and the other was a heavy smoker).
4. I do not smoke
5. My EKG was normal both times at 268 pounds and 240. And I passed the stress test at 268 pounds.
6. I have recurring lower back pain every three months or so that pretty much debilitates me for a day (never mentioned this to cardiologist but I just recently learned this can also be a sign of CVD).
7. Always had an issue with lockjaw when yawning too hard (may be irrelevant but also learned jaw pain can be an indicator).
8. When I was heavier I would have dizzyness when I stood up too fast after sitting for a long time but this seems to have disappeared after losing weight.
9. Pain gets slightly worse some of the times when I apply pressure or when I bend my upper body to left or right, this isn't consistent though.
10. Not on any blood pressure or cholesterol medication, I asked if I should last time and he said not at my age despite me having pretty high cholesterol since I was 13 (usually ranged from 210-230 if I remember correctly).

What would you diagnose this with the information given? Should I push for further testing? Is there a way to definitely determine if it is musculoskeletal pain? I have a yearly appointment with the cardiologist coming up with a full lipid panel etc. Is there anything specific I should bring up to him?

Thank you!

Thank you for the insight Dr. Partap. What type of doctor/specialist would you recommend to address this widespread pain? It is mild like I said and doesn't really hinder my everyday activities other than setting my anxiety off which probably exaggerates the chest pain. My main concern with the pain is that apparently most of these musculoskeletal issues resolve themselves in a decent amount of time but this pain has never failed to constantly show back up every month for a good 6 years at this point even before I started losing weight which is why I thought it was angina originally.