In my opinion you do not have a case. Your first problem is standard of care. The question isn't whether the diagnosis was wrong, but whether the diagnosis fell beneath the relevant standard of care. Would another specialist in this field consider this a reasonable diagnosis?
The second problem you have is damages. Medical malpractice actions can be extremely expensive. If you add the costs of filing suits, ordering medical records, paying experts, paying court reporters for depositions, etc. the cost to bring a medical malpractice action to trial could easily exceed 30k. Now, consider your damages. Do you have additional medical expenses? Did you lose wages from work? Do you have documentation from a relationship psychiatrist demonstrating your severe emotional distress?
*DISCLAIMER* This answer is for general informational purposes only. This answer does not constitute legal advice, nor does it establish an attorney client relationship.
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