I've been Bi-Polar for many years. I was actually diagnosed around 18, but my sophomore year in high school, I lived with my aunt and uncle and my uncle was convinced even then that I was bi-polar. (He even went so far as to beg my mother for permission to have me tested)..
I laughed it off at the time, saying I was just a normal teen.
Some of the symptoms I remember from that time period though, were not "normal" in hindsight.
I would be doing normal things, when out of no where I would be seized with massive anxiety. No reason, I would just become very anxious.
I was also very exciteable out of nowhere and for no reason (mania). I remember this happening more in the evenings. I was always a very poor sleeper.
I could be washing dishes, and all of a sudden get super, super excited about nothing and would end up with the energy of a little kid- jumping around, talking fast, staying up all night. I always wanted to be around my friends because being alone could trigger the depression. I was terrified of being lonely and falling into that horrible sadness I couldnt shake.
There were even times at school when I should have been fine, when friends would ask me all day "whats wrong?" and I just didnt know. The moods could change instantly and without rhyme or reason.
Im 28 now, and although I was diagnosed at 18, I refused medications for many years. I was hospitalized after the birth of my second child for post-partum, and the bi-poal. At that time, I stopped telling myself I wasnt sick and decided that even if I felt "fine", I needed to take care of myself for my children.
I still have ups and downs, but it's not the ROLLERCOASTER it used to be. And it literally was a rollercoaster.
If you have any questions, feel free to ask. If I can remember more of my symptoms, Ill be sure to take note and post them.