It's good that you trust your Endo. However since you are trying to conceive does your endo specialize in reproduction? If not, than I would suggest you find a good Endocrinologist that specializes in reproduction for a second opinion.
You have to trust your endocrinologist I guess..
I was also stuck in the exactly the same situation as you, as to whether surgery was a really necessary or just suppress it using meds.. I am glad I took the option of surgery as the other little nodules I had beside my follicular lesion were pap cancers...
I would be more worried about those other little nodules you have.. They may be harmless nodules, but you don't really know..
In hindsight it would have been better if you had surgery 7 years ago, I hope it goes well for you..