Some will say it is normal while others will tell you it is paranoia. We all get the feeling at one time or the other but when it becomes too pronounced or constant, you should talk to a doctor or psychiatrist for expert advice.
Well if your not a Christian not married living alone or a house that hasn't been anointed it's prob just the devils spirits in your house anything odd happened? Well it happened to us while we were kids my mom and dad fixed it the only way is to get the man of the house to anoint and open all windos and doors the man your dad.. Only young children and animals may see these floating black eyed demons hope I don't freak you out but it's true sorry watching twillight or any movies like that don't help..
No that's pretty normal, as long as it isn't all the time and making you really nervous. Just when you feel like you're being watched, take a quick look around to make sure there truly isn't anyone there. If there isn't, forget about it.
There are many opinions on the subject. Especially with you being female, the first thing to ask yourself, is this your intuition at work? Another side if this is chronic and affecting your life, you may want to talk with a mental health specialist about the potential for paranoia. Then there's the far fetched notion (and I think an interesting one) that there is a paranormal answer. If this feeling only occurs at home, you may want to check the EVP readings, you may have an electrical source that is actually causing the feeling.