I study medicine, and I always think from a healthy perspective.
I suggest you go to the hospital for a simple check-up. If there is really no problem, your classmates will be relieved and naturally won't have such a dream again.
In addition, students are now under great pressure to study, so they should relax moderately. Health is the capital of revolution. If you see so many people lose too much because of illness like me, you will pay more attention to your health.