Welcome to the forum. I was sent home the same day as well and like you feeling rather anxious but as time goes on it gets better. I am still getting the odd sharp pains that leave me feeling a little uneasy, but I feel things are improving and I have a final check later this year. Tiredness can be a factor, try to rest when you can, but try to relax as well.
I know all too well what you are feeling.
Don't over do it on the lifting or exercise, light exercise every day I was told. Then after 6mths you can go back to the normal.
And ginger2 don't worry, you will be fine...
Here for you anytime you want to talk It does help.