Heart Papilations

I’m having heart palpitations all day to the point my head hurts and I feel like I can’t breathe. I suffer from major anxiety but what I hate about it is even when I’m not anxious I get the physical symptoms which makes me anxious in the process like whyyy. They get even worse during my period. I don’t know what to do I’m scared and I hate it it’s so uncomfortable. Has anyone experienced this