Hello. While I am no Therapist or Pshchiatrist it certainly sounds like you have the highs and lows that go with Bipolar (I am Bipolar II and I have ADD and Panic Disorder and a Personality Disorder,and Anxiety Disorder all are just "Lables" quote,unquote.) What dosent sound like my Bipolar is the fact that you say you feel like everyone is out to get you which is known as "Paranoia" my father was a "Chronic Paranoid Schizophrenic and he also had Bipolar Disorder",he was hospitilized 14 times by the time I was 17 years old,at the time of his last hospitilization I had a nervous breakdown.Anyway back to your post,the Paranoia sounds more like Schizophrenia to me.Only a doc can give a true diagnosis,what you could do is begin to keep a journal and chart your moods,when you feel happy(high or manic) and when you feel sad (low or depressed) also note if anything seems to precede these episodes or trigger them,this would give a therapist a baseline to go by. I wish you luck,and hope this helps.
When I was first diagnosed with BP I remember telling my husband and mother that I felt like I was 2 different people and that we were at a battle with one another.