Last few days I've noticed an increasing fluttering/ palpitation sensation in my chest & short sharp heartburn like pains. Otherwise I'm totally fine & doing HIIT classes no problem etc.. I'm 47 so assuming this is yet another perimenopause symptom, I know it can be ... or is it? I'm aware it's started a couple of weeks after my booster jab too - could be related?? Would you go to docs about it? Really don't want to waste their time. thx