It's possible to feel normal after, rather than a full spiral towards depression. Granted, for me it's uncommon but it has happened a few times (I was hypomanic and barely remember the days following an actual manic episode considering I was asleep for almost two days, but felt mentally stable afterwards; not so much physically).

Bipolar is different for everyone but it is a wise decision to get a second opinion. I got three different opinions before I finally accepted my diagnoses, but mine was less murky; I just didn't want another diagnoses.