Dealing with Pericarditis Flare Ups: Need Help Coping with Pain

Was in hospital again last night from unbearable pain and they’ve given me stronger painkillers but they don’t seem to do anything short term it’s more of a building up thing and there’s nothing much else they can give me, does anyone know how to cope with the pain of pericarditis flare ups? It feels like I’m having a heart attack none stop for days, sometimes I can’t breathe and it’s really ruining my sleep and eating. I’ve been staying as calm as I can but nothing has helped, how do you cope with this? I’m not a crier but I burst into tears when the attack hit me.