Idk, running from unpleasant truths isn't great either, so be careful that you're not just shopping for a convenient diagnosis and instead looking for the truth. A second or third opinion is absolutely a good idea if you think your doctor is missing something (esp. if they refuse to run a test you think is necessary). Just remember that this goes both ways, so that doctor that tells you what you want to hear could be missing what the others have seen.

In other words, don't mistake hubris for confidence.