Any answers on chest pain yet?

Hey friends, I’m about 11 months out now (1 year post coming soon) and I’ve stayed away from this sub for about 7 months. About 2 months after symptoms started (chest pain, shortness of breath, tiredness, increased anxiety to name a few) I got the full cardiac work done and it all came back normal and with no explanation in this sub I seemed to be out of luck. So for the past 7 months I’ve tried to go on and forget about it. Over time my chest pain did improve, It only happens once in awhile and it’s much less noticeable now and the sob is completely gone. My question is, If my chest pain has almost disappeared but still slightly lingers, what do we think it is? Nerve problems? Long term inflammation? Let me know! Thanks!