Hi M2C
Just read your post been away but a dominant follicle is one that hasnt ruptured a dominant follicle is the one that is ready to realse the egg so maybe you ovulate later in your cycle than you realise, also DTD would be painful due to the size of the follicle usually they rupture at 18 to 22mm if yours is 26mm i would say it would be cuasing some (if not alot ) of discomfort. Dont really know much about the fluid side of things, but i hope ive helped a little. If it keeps up i would maybe see someone about a possible pregnyl injection to make you ovulate. Can i ask are you temping? as that how you know you 'O'd last week?