Welcome to the chat group! It is true that bipolar disoder is considered a chronic illness that can only be treated through meds, but not cured. Other illnesses like diabetes don't have a permanent cure either. I am 23 years old and have been on medication for 3 years. Sometimes it is hard for me to accept that there is no cure. It seems weird that when I am 60 I will still have this, and still have to be on meds. However, the alternative of living my whole life unstable isn't even an option. Maybe with modern technology, one day there will be a cure.
My life is much better now that I am stable on the right medication. I lived with undiagnosed/misdiagnosed bipolar disoder for about 5 years. Those years were aweful years. Had I been treated correctly sooner I would have been better off.
When you see your doctor just be as honest as you can about your symptoms. If it turns out you have bipolar disorder, just know that treatment is the best thing you can do for yourself. Oh, and just because you have this disorder doesn't mean your son will. The rate of having bipolar in the general population is 1%. If a parent has it, that 1% chance of having it does go up. However, it still no where near 100%.