Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

https://www.dailystrength.org/group/brain-injury/discussion/atax_1
You say you don't want to worry your parents, but. . . Are you old enough to ask for a private talk with your doctor? I consider my primary care doctor the best place to start for a discussion like this.