I am constantly tired, nauseous, gaining weight and not pregnant. my cycle has changed in the last year from normal to normal for missing one every 5 months. can't get answers from my dr's, any idea?

Hormonal inbalance: This is the basic answer to a complex yet simple to find problem. These issues that you are describing can be due to a simple thyroid issue that is very common in women and treated with replacing whatever hormone you body is missing. I suggest you go to your primary care doctor for simple blood work.

More information?: You need further evaluation: weight, blood count, blood glucose, liver enzymes, thyroid function... Any depression? Hepatitis, gastritis? Go to md, let us know, thanks.