Early sign of Schizophrenia?

I have been going through something that past few months that is really disturbing me. It is really hard to explain but I will give it a go. I feel like I am going through life on automatic. I feel like I have no thought process, and when I have thoughts I feel like I am observing them instead of being the one experiencing them and using them to go through life with. When I do things I feel like my body is doing it on auto-pilot. I feel like I am up in my head watching everything happen and im not connected with the things around me. When I can't take it anymore I get really scared and have a panic attack then I feel like my whole body is filled with air, or like I'm not in my body, but I'm in the air watching it all happen. I have not experienced hallucinations, heard voices or had delusions. I have been to the hospital for this a few times and they said it was anxiety. I don't see how this can be plain anxiety if I feel disconnected from myself every day. I will admit that all of this started happening after depriving myself of sleep and smoking pot. I have been getting regular sleep and staying away from drugs ever since then, but I am still the same. The reason I am so worried about this is because my father has schizophrenia and I know I have a greater chance of getting it than anyone else. I am not looking for a diagnosis, I just would like an opinion. Do you think this seems like an early sign of schizophrenia?