I've been using Spironolactone for about 2 years now. My doctor prescribed Yasmin (the older version of the Yaz BCP) to take with it to correct the hormone imbalance. He said I wouldn't have any problems, because the pills are just getting my hormones back where they should be. Granted, I can't have kids, so he may not have mentioned anything about those particular kinds of issues because he knew they wouldn't come up.
I wish I knew what to tell you, but you should really go talk to your doctor about that. They're probably smarter than I am
In any case, good luck with everything!