Yes, I'm a little confused about what you (lb558846) are asking.
If you're just asking if you're pregnant, it seems very unlikely to me -- but I don't know.
Are you asking whether you should find a new doctor?
Otherwise, I don't really get why you're not listening to what the doctors you have been seeing have been telling you.
Sometimes things are "off" without any major medical issue behind them -- if all of these tests have been done and the conclusion is that nothing major is wrong with you, then I think you can relax and move on.
If the conclusion is that something is wrong but they don't know what, they should keep looking.
If the conclusion is that nothing is wrong or they don't know what, and for that reason you're unsatisfied with the care you're getting, then probably a good idea to move on to a new doctor.