I was finally diagnosed less than a year ago at age 53 after 20 years of misdiagnosis. It can be daunting but also liberating. Now I know what I'm dealing with I have found that coping has become much easier. I know the signs to look for, the trends in my mood journal, the side effects of my meds. I'm acutely aware of every physiological and psychological change in me. I'm trying very hard, now, to not let the condition own me or rule my life. There is a version of life available within which I can embrace this uniqueness about me rather than waste energy on hating something I have no actual control over.
The toughest challenge by far is finding the right cocktail for you. Like many who have posted here I have been on a range of meds and I can hopefully say I have found the right regimen for me; if I'm right then I'm one of the lucky ones in that it didn't take too long - I hope the same is true for you.
You are in a good place now (at PC) where you will find lots of support for every step of your new journey.