you could always get the ball rolling with your GP and ask for full blood works (fsh, tsh, day 21 bloods, iron, vit D etc) just to make sure everything is as it should be?
I have no idea what that means but thank you, sounds like something simple enough I can do that may give me some answers!!

I have heard people say to take vitamin b6 to help make their Luteal phase longer.
Yep, tried that. Also on vitex at the moment from the acupuncturist. Seemed to work last cycle but not this one