You could still have Hashimotos as the thyroid tends to fluctuate, esp in the inital stages.  I'm sure they tested you for anemia and other diseases with simular symptoms.  Sometimes they'll even try you on a low dose of sythroid (or other thyroid med) to see of that helps you even if your labs are normal.    I also have other mild autoimmune diseases which seems common after talking to others with the Hashimoto's.  It's pretty frustrating to feel something is wrong and not have an answer. Hope you get one soon.