I'm not familiar with Insulite (and the only thing I'm finding is some proprietary system that's more than just a single medication or something), but you don't need to go off Metformin to TTC. In fact, it's often beneficial to women with PCOS.

Generally speaking, it's possible the Insulite is interacting with the Dianette (the most likely one to be interacting with, given the symptoms) and making it less effective. It's probably a good idea to double-check both items to ensure there aren't any interactions. If your doctor put you on the Insulite, it's probably also worth talking to them about it.

Also, it might be a good idea to track your food back the past several days. The last time I tried Metformin, it caused food aversions that I didn't pick up on immediately, and resulted in changes in my diet that then resulted in an acne flair-up (since a lot of my acne issues are diet-related).