Endometriosis?

Mollie • New to glow, so hi :) Planning for a baby in next few years with my wonderful partner.
I won't go into my symptoms and bore you, but after various appointments and research, I am almost certain I have endometriosis. 
​As you may know it is traditionally difficult to diagnose, with it often taking a long time. I am heading to the doctors this week hopefully (appointments are so hard to get hold of!) and unsure what to say? I know things are wrong and need investigating, but I don't want the doctor to think I am simply 'putting on' the symptoms or trying to do their job by saying what I think. 
​Sorry for the ramble, and also possibly posting in the wrong forum - the condition does effect fertility and TTC so thought I would mention here as it will be effecting people as well as me. 
​Thanks :) 
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