I Accidentally Overdosed Calcium? Help?

Hi,

On Sunday I took calcium 800mg(per two)at 9 o clock. Next day afternoon I took 800mg at 3 o clock and I forgot that I took the dose and I took another dose of 800mg at 6:45. I suddenly started feeling breathless, anxious, dizziness, constipated. I drank lots of fluid and it did got better. But on Wednesday night, I went to bed and my heart started racing when I checked it was over 100. I was having left arm and chest pain. I called ambulance and went to hospital. The doctors said there is nothing wrong they checked they said I have fever. When I came home My heart rate came to normal. when I popped. But i'm constipated and I feel dizzy and I still have fever. My body is like tingling. I need help. I took supplement called Health Aid Calcium Complete 800mg. It has vitamin D in it. Check it here link http://www.dolphinfitness.co.uk/en/healthaid-calci...

at the moment I am taking paracetamol ans bought seena tablets from pharmacist. I am 20 years old and vegetarian. i am not taking any doses at the moment of the calcium.