20 year old male and Stress cause health problems.?

I have been under alot of stress and have been have health problems. I have nausea, feel off balance, and notice one of my pupils were bigger than the other(only at night). They are normal most of the time and react to light. Can stress do this? I feel off balance to the left and it worse in the moring. From the time I wake up the only thing I worry about is my health. With balance I have never fallen and I can stand on one foot with both leges so I dont no if its just me. Can chronic anxiety cause this. I dont have bad headaches, but I do get them. Please anyone who has gone thro this. I always think the worst like tumors, but family and docs so no. I went to the docs for months when my stomach problems happend and they said it was all stress. I dont want to have to go back time after time and be told the same for this problem. I have 2 kids, my house burnt down, sone needs surgery, and thats my stress. Will that do this to you. Iam so scard and worry the worst.

Yes, it can. My husband went thru stress over a lawsuit this last year-him suing a manager for physical and mental hurt and bringing a gun to work etc-scary decision about a scary person. He worried about his job, our health and welfare (safety) and all. He took on several physical symtoms, I also had trouble sleeping, gained weight and in the past I have had eye twitches and muscle twitches from it. Get a good sleep aid and go for walks-I know it sound stupid but good physical excercise helps tons. Also make sure the Docs have checked you for any infections. We had a little girl in the neighborhood come down with what they thought was a horrible cold and ended up with an infection on the frontal lobe! Serious! Almost died! It sounds like yours is all stress though-so just make sure they blood tested you or such for any such things. You sound intact,your family is-so that means (as My Mom would say) you are either too mean to die or be gone, or God has other plans for you! Good luck!