I agree with the majority & have the op.
I was similar to you in that they thought I had PCOS, I had very mild symptoms of it but I also had symptoms of endo. I had the lap & they found very mild endo which was removed. This was back in 2004. We'd been trying since 2002. Fast forward to 2011 & I STILL wasn't pregnant but had had 2 miscarriages.
I insisted on another lap because I felt something wasn't right & had a questionable 3d scan on my uterus which was showing it may have been t-shaped. They had to do the lap to get a better look at my uterus. After surgery my fs said that my uterus was fine but I was riddled with endo. He wasn't even confident he had removed it all. 2 months later I was pregnant after almost 10 years of trying & this baby stuck. I was naughty though & knew about the window of fertility after a lap, like @KatiesMum mentioned, so I took some remaining tamoxifen (similar to clomid) so can't say it happened completely 'naturally'.
TTC 10 years & finally got our miracle bub............finally!!!!