I agree with ddnos! Sounds like you may need a med adjustment. There are certain behaviors that help me head off a manic episode, like getting enough sleep, slowing down my schedule, laying off the caffeine, and taking my Seroquel as directed (which manages my bipolar and makes me sleepy at night). But these are things I do to help prevent mania. You sound like you are in the midst of it, so seeing your doc asap is your best bet.
For someone diagnosed with bipolar disorder, it is extremely important to have a psychiatrist determine which medications, at which doses, will work best for treatment, and then to stick to that medication regimen. Eventually medications may need to be reevaluated and adjusted.
It is hard to imagine a scenario where it would be a good idea for a bipolar patient to not take their medications. I did so once, successfully, during one of my pregnancies, but immediately after the pregnancy, still off meds to breastfeed, my bipolar symptoms quickly spun out of control so badly that I went in for a week of day hospitalization. Not taking meds is a huge risk.
Most people would think it ridiculous to ask a diabetic whether they thought taking their meds positively impacted their life. A diabetic needs insulin. Period. The usefulness of medication that has been demonstrated to successfully treat mental illness is no different.
This is something that I have wondered about also, as a woman with bipolar disorder, and I definitely have noticed that physical illness impacts my bipolar symptoms. I have two posts on my blog, My Big Fat Bipolar Disorder, that relate: