Chest pain. Relief and sometime not.

Mother 65 year old having TVD and one Stent placed in July 2022. And other blockages are managed by medicines. Due to chest pain angiography done in July 2023 but this time no Stent placed and previous Stent was OK. Now again she he having chest pain occasionally. Our cardiologist saying no need of angiography. Doctor also prescribed trimetazidine 35 mg and nicorandil but because of no Effect they stopped after one month Now the medications are Atorlip gold 20 Metxl am 25/5. Metformin sr 500 mg Myonit sr 2.6 Her latest test report lipid profile, kft, lft, vit b12 and D3 is normal Hba1 c is 5.9 Please suggest what to do because she is having chest pain and sometime in SOS  isodril 5 mg gave relief and sometime not.