What Causes Dizziness, Numbness From Face To Fingertips When Diagnosed With Anxiety?

Hi I am 22 years old and was put in the emergency room a four months ago ..to me i felt like it was an allergic reaction ..I was dizzy .numb from the face to fingertips and felt if I didn t stop pacing I d faint ...my heart rate was 185 at rest ..that was laying down for twenty minutes ..I was diagnosed with severe panic and anxiety .I was shot with adevan that calmed me in thirty minutes ...now being months later I still feel rapid heart beats ..where I can most of the time feel the strong beat in my chest at night ..I ve been continuing to taking benziods for the panic but I m still feeling strong blunt rapid beats with half the time chest pains ..I have trouble sleeping as well ...the hospital told me smoking marijuana caused the panic though I ve smoked cannibusfor ten years and never had anything happen besides relaxation and the more ability to eat ..I haven t smoked for months now and ever since the dreadful day I ve felt abnormal feelings and heart palpitations ..they x rayed my heart while I was there and said it was healthy but I don t feel like it is ..do you have any idea what could be happening here ..I feel like its more than just panic and anxiety ...I ve never had these problems in my life and then suddenly that one day I m in the er feeling as if my body was turning inside out ..