Please help me ladies

I'm in the UK so it may be different from the US but I'm so disappointed got my results from my GP from my ultrasound. She said they are very good i ovulate on my own and I am being referred to a fertility specialist but she recommends nothing for me at the minute apart from Metformin. So why am I not getting pregnant. She said I have nothing wrong with my progrestrone levels they are at 31!! A private doc told me this is a super result but not bad either !! I need some advice on this please ladies. We been trying nearly 2 years. Nothing wrong with my SO either as he had kids. I'm so confused and can't wait all these weeks until I see a specialist !! :-/