There are many problems you had.
See these many symptoms develop when there is change of place, change of food.
Are you staying in hostel ?
If so then do not worry try to eat healthy food , see your relatives and spend some time with them .
These are all somatic symptoms or psychological symptoms that doesnt mean that you have any problem psychologically You are perfectly fine.But symptoms do develop when there is any stress
in life or on the body.
get well soon .