I Have Been Dealing Witb Minor Chest Pains For Weeks..a

I have been dealing witb minor chest pains for weeks..a couple days ago my heart starting racing and i couldnt breathe. I called an abulance and went to the er. My initial blood pressure was 133/85 and was told my immediate ekg was not good. After being hooking up to oxygen i started to feel better but still had chest pains. I had an xray done and another ekg and they said everything looked good. I was diagnosed with anxiety attacks. Im conerned because if i let my valarian root wear off i start to feel nauseous and heart starts racing. Can this really be anxiety attacks? When i start to feel this way im not stressing or thinking about much but the symptoms seem to be constant