Chest pain

Hi All this is my first time. I have None Small Cell in both lungs. I was first diagnosed 18 months ago. My treatment stopped working in February this year and Lockdown stopped treatment all together.  In Sept i was accepted onto a trial for an unlicensed drug in Newcastle Freeman Hospital. This was successful but has been stopped as s CT found secondary  tumours in my liver. They are small but they are there and the rules of the trial meant treatment had to stop. I have the opportunity of a new trial opening up inthe new year. I have been well since stoping treatment but had a bit of a do on Boxing Day. A pain started in my jaw and radiated over my left shoulder and back. It was excruciatong as if someone had a vice on my chest. I ended up in hospital to be checked over. The pain had stopped and the conclusion was that my tumour must have pressed on a nerve. I have not experienced this before. I was told to take paracetamol 4 hourly and come back if it recurred. My bloods were fine. My general obs were fine and my xray did not show anything other than what they would expect. Has anyone experienced this? Is there anything i am doing which is making it worse? Is there anything i can do to prevent it? Any help would be much appreciated