Is it normal to feel like youre being watched ?

I've actually had this from a young age, it comes and goes, when I was young I refused to use public toilets or ones at restaurants in case of cameras, I'd be doing daily activities and become aware that I may be in the process of being filmed, even in my bedroom, I was aware it was paranoia and that there wouldnt logically be any cameras but that wouldnt take the feeling away,
Went away for years but I went to see father John misty recently and use a cubicle at the venue, then had the nagging feeling of there being a camera again,

Apparently it's surprisingly common, not full on Truman show delusion which is a kind of psychosis but the irrational fear, it's usually however a sign that something may be up, potentially nothing serious but for example I have attention deficit disorder which makes me more prone to anxiety and depression etc, so it may be worth speaking to a gp but don't automatically assume it means something serious, however I also think people are too quick to laboe someone as having a certain disorder so maybe it could be a byproduct of the technologically intimidating and scary world we're in