the passage of dark urine is of the side effects of suboxone
you are taking, if you have a pre existing liver
disease then it will worsen it, you should get your liver function tests done to see if your liver is functioning well.
for your periods not been there for three months are you taking any other medications with the suboxone it could be that the drug might be reacting with suboxone or it could be a problem with your hormones leading you to have missing of periods
i would suggest you see a physician and gynecologist for further review and treatment
hope have answered your query