Then a medical visit may not do much for you. This is where therapy may come in. Unless you're rapid cycling, which it doesn't sound like you are (you don't sound like you're headed for mania), then figuring out what changed and what led to your emotional state of feeling better could benefit you greatly. If it was some action you took or even just time passing, those are things that can be figured out and utilized to help you in the future.

I had a previous psychiatrist tell me that meds alone can only do so much, therapy alone can only do so much, but the best success in treating bipolar is via a combination of meds and therapy. That's the best evidence-based success that medical science has to offer today.

Good luck, boogie.