Some Strangeness

I always feel that I am doing something wrong.Always finding myself thinking like "I thought like that but I know it's not what it is.So why these thoughts are present?"

Also I have excessive paranoia I think.Everytime my phone rings I feel anxious.Negative thoughts are always in my mind.Sometimes they are horrifying.Sometimes I find myself thinking something bad that I don't want it to be happen actually and after a second I tell myself "don't drool,that doesn't make sense,no you don't want it" etc.It's like this is not me and I'm fighting with someone but I can't see or hear or feel it.

I don't think it's normal but I don't know what is this.I couldn't tell everything because it is hard and strange and my mind is a mess almost all the time.