I am a 20 year old female. My eyes sort of bulge out of my head. I tested negative for Thyroid disease and I'm still looking into Chron's as a possibility for the cause. If that is not the cause what else can it be???

Also, about 3 months ago I've been experiencing bad headaches around the frontal lobes and the temporal lobs too. I noticed a slight change in behaviour/personality (more introverted and antisocial behaviour) as well.. I'm a little worried about an abnormal growth in my brain somewhere. Should I go get a CAT scan or other testing to rule out a tumor or even cancer???? Or maybe I'm just worrying too much