Hi Nikkie, first, here's a hug, so you know you are not alone.
A lot of us on this section of the forum have many of the same problems you are living with. The depressions and the highs, I mean. It sounds to me like you are in the right section to post. Hang around here for awhile and you will get some good information. But also, talk to your doc,(or who ever is giving you the medications you've tried) and ask him/her if they've ever considered you might be bipolar. Then tell them the same symptoms you told us. That should help you get some answers.

Meanwhile, know that all you have to do is log in here, and you will find yourself no longer suffering alone.