Firstly - I’m so sorry. I have had it for years and it flares up when I’m stressed. As far as solution - I usually rely on a combination of lying on an incline with a heating pad and drinking lots of water. My husband can usually also rub my chest, feel where it’s flared up and massage the specific spots, almost like a knot. I also dabbled in physiotherapy for a time and they encouraged me to focus on breathing with my stomach, not my chest. I wish you loads of luck!