Hiya Biba... without an idea of what you're eating, how much exercise you're having, etc etc etc, it's not easy to advise.
A true stall is 10 days without loss and you're heading that way... in the original diet, he'd advise cutting down on salty pre packaged products, changing something (if you're eating the same thing regularly, say, try something else... to hopefully kickstart things again). Check your diary quantity. Dairy causes me to stall. Can you increase exercise? When are you eating your oatbran? Is it the wrong time of the month? Is your "transit" ok? So many things can affect us...
Often, suddenly, a loss will come for no apparent reason, but I'm responding as I know you've been here before and I know how hard it is to stay motivated when there's no loss.
Take care.