over-paranoid or normal stuff?

When i came back with my sister from a family trip to Norway, for personal reasons we had to fly as unnacompanied minors and stay and grandma's house for some time. The situation at home was a bit stressful since my mom was sick and thyroid cancer surgery coming up soon, meaning she'd have to stay a little longer and we couldn't stay with her because of school, kindergarten etc...

I have a feeling im constantly followed when im outside, and when im alone i have a creeping feeling on my back that im watched by a bunch of invisible cameras. I've grown a bit distanced from my friends and i dissasociate regularly; as in i randomly queitly snap inside my head, stare at my hands and realize my body and lifetime is the only thing i have, had, blah blah, blah.

Now the feelings have passed, but im wondering if i was just overreacting.