well its kinda normal it will happen in life but the best thing you can do is move on
I would get a professional diagnosis from a good Psychiatrist.
Sounds like your having what is called Rapid cycling. Rapid Cycling is less common among people with Bi-polar as they normally cycle at slower intervals, but some Bi-polar sufferers do rapid type cycling.
There is treatment for it, but it will take a good Psychiatrist to combine the right meds to stabilize it.