I think it's a pretty normal thing to doubt. It was for me anyway. I just kind of put up with it for 10 years because I'd get in "normal" periods and think that I was just kind of making all the rest of it up. Almost split personality in a way (although not really... I don't want to even pretend to know what THAT'S like).
Sometimes it would be painfully obvious that I needed some drastic help, but then after a few weeks (or months sometimes... depending) I'd just... not feel that way anymore. Very damn confusing.
Particularly since it doesn't sound like you have a concrete diagnosis yet I imagine it's even more confusing.

Maybe the test would be a good thing?
That said... I got a 50 on the test. I'm taking that as good.
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.age: 34 female .bipolar I .psychosis .panic/anxiety disorder
Seroquel XR 100mg
Labetalol for high blood pressure