Hyper-vigilence is a common symptom of post traumatic stress disorder, but smelling strange things is sometimes a symptom of schizophrenia. Your other symptoms could be caused by a number of things. Seeing that schizophrenia runs in your family, I would definately get checked out as soon as possible. I've read that they can sometimes prevent schizophrenic symptoms turning into full blown schizophrenia if treated early enough. So if I was you, despite your desire not to get out, try to get to a professional, who respects you and takes you seriously, as soon as possible. I am not determining by what you wrote, that I believe you have schizophrenia for sure, because many of the symptoms can also be related to having a full blown anxiety disorder.