This happened with Stan, although I'm sure it was a bit later....
My let-down has gone from about 1.5-2mins to about 5 mins. Makes for a really unhappy, frustrated baby (and likewise mum). I get bitten and head butted, then she gives up in disgust and just cries, which all adds to the general atmosphere of horribleness.
There was no 'cure' before, I just had to wait it out. Like last time, I'm sure that a big part of it is being so run down and not really taking care of myself (skipping meals, eating cr@p), and of course being so tired.
Like last time, I'm taking Fenugreek because if there's just more milk there all round, maybe it will encourage her to just hang out there a bit longer and maybe wait long enough for a let down.
it DID pass... it WILL pass... I fed Stan til he was 2 and I want to do the same with Audrey - although she is a much less patient personality, and may not let me