Am I in God's will?

I have been tormented and sick for almost a month straight. Fainting, headaches, stomach pain.
I am afraid and I have questions.
Am I in God's will? Am I suppose to be here? What will happen? Why is this happening?
I have been a healthy person. Now that I'm in school, my health is troubled. Stress is not the answer.
I have missed school, but am doing well.
I ask for prayer. Serious prayer.
I am believing on Romans 8:28.
I have faith. Faith is stronger than fear...
I have a fear of dying. I have a fear of being robbed of the life promised to me.
In the name of Jesus the torment stops. In the name of Jesus I am free from all disease and sickness. In the name of Jesus I am promised life and life to the fullest. SATAN YOU HAVE NO HOLD ON MY LIFE.
God I just want to be in your will...give me a sign...please.
Don't turn your face from me. Hold me now I need you so so close for I am afraid.