Day 5 - Puzzled

So far, this cycle has been extremely different to the last one. And I'm only on Day 5! Last time my period continued throughout the 5 days of taking Primulot and then went on heavily for another few days. This time I stopped almost immediately on Day 1 and haven't had anything since. Which is all very nice, however I'm slightly worried as the whole idea of down-regulating is to still your ovaries and empty out your womb to a menopausal-type state. If I've not had a proper period then surely my womb lining is still thick? The paper-work with the tablets does say that your period might stop and then come back. So perhaps it's just in the 'coming-back' stage. We'll see.