How Do You Know?

Sometimes I don't know what's wrong with me. Sometimes I am so angry that anything could set me off screaming and ranting. And then sometimes I am so sad that I don't know what to do anymore and the tears come. Then other times I am bouncing off the walls, giddy, happy and yes its been described as crazy. I don't feel normal at all. When I was in high school I had an episode of uncontrollable crying after my friend near collapsed when we were jogging. The teachers became worried that I would do something as I went into a funk after and withdrew inside myself. They sent me to see the school's psychiatrist. I had a couple of sessions with him and he diagnosed me with having a large super ego and id which was crushing my ego. I'm not a very smart person and I don't have a clue when it comes to psychiatry so I still don't know what that means. Anyways after that grand diagnosis nothing else was ever done so I figure it wasn't important. After my mom past away I was told that going by what people have said about her it sounded like she had borderline bi-polar disorder. I don't know what to do cause I don't know who to talk to. I have tried speaking to another pshychiatrist and doctors but I just feel like I am wasting their time and that there is nothing wrong with me that I can't live with. I just have to toughen up. But what if there is something and I am just continuing a cycle that was started by my mother with my own kids. I want my kids to be ok and not deal with the swing that my emotions seem to be on. Is that was bipolar is? And can anyone help?