What you are describing is rapid cycling, and is very tricky to treat. I have bouts with it myself. It can vary from one day to the next sometimes. My meds have to be adjusted on a weekly, biweekly or monthly basis, however fast I'm cycling.
All BPs are different; there is no one "cocktail" that works for everyone. It takes constant contact with the pdoc to report progress or lack of. A lot of people just take what they are given, thinking the doc knows best. Not true. Only the patient knows, and with BP the patient is just as responsible for their progress as the doctor, in fact moreso. Don't wait for the mania/depression to progress. Watch for the first signs and report them early. Antipsychotics are excellent for rapid cycling, along with mood stabilizers and some kind of antidepressant also. Lots of times, it's all three, but the kinds of each varies with each patient. All patients don't tolerate all meds. And it takes a while for some to start to work. BP is hard to treat, period, and usually doesn't stay the same.
I was also BP as a teen, it's not uncommon. The key is for family and the patient to get as educated as possible about this disease, that way the patient can have optimum results.