Chest pain for months post Covid. Heal?

I had covid in jan22 with bad cough and covid tounge. Hrct showed normal and was on fabiflu as treatment, but a week post recovery started getting a dull chest pain mostly centrally located near sternum. I did an xray which showed increased bronchovascular prominence and did a PFT as well which showed copd in restrictive area and moderate obstruction. The physician put me on foracot 200 and muscle relaxants. The chest pain has reduced however now I get the pain mostly in the night while sleeping which is again centrally located and at times radiates to mid back. I had done ecg twice aswell, both times normal. Repeated CT scan as well a week ago and no remarkable findings in lungs. It's been 4 months and I'm frustrated waking up with the chest pain. Please advise what this is and how long would it take to heal ?