Hello Rachie - I have a similar story to mandy, I have had a missed period once and various other symptoms coming and going. My GP wanted to diagnose early menopause in January after a high FSH reading, I have since had a second one which was normal. I have not had children but older than you at 44, now just 45 and had almost come to terms with it all, as it was also circumstances. I have left pursuing any treatment for now as my periods seems to still be arriving, albeit differently.
It sounds as if you have another appointment with someone - having a scan? Is this part of them diagnosing you with early menopause? I would suggest you try and get a referral to a gynaecologist from your GP to talk all this through or perhaps your GP can guide you to a fertility clinic. I don't think it is too late for you to pursue this, it's certainly too early to close the door completely. Please don't do that until you have investigated things more.
There is a website for early/premature menopause called the Daisy network and it has information for women, some in their 20's, on options for having children. It might be useful to read some things on there x