This may not mean anything, of course, but I read this over at TVRules in the Live Feed Area. And I quote-
"Alison says she is yet to have her period in the house. Robert says ever? Jun says she went off the pill before she went in there. Robert asks if Jun is on the pill? Jun says yeah, she's been on it for nine years. Alison says she's been on it for ten (hmm, that made her 13) Jun says a lot of peolple go on it to make them regular"
While reading the Live Feed Posts I also noticed that Alison does take alot of naps. While both of these things can point to pregnancy I'm sure it could point to several other things as well. I don't think the producers of the show would want to risk a lawsuit and that's only if they know she is pregnant. If she is pregnant and they know than how could they let her survive on a pb&j diet? She needs milk and prenatal vitamins at least. I'm sure it's just the stress of the show but I don't understand why she would want to go off the birth control pills right before she went into the house. I guess we will just have to wait and see.