No I don't believe it means the baby will come early. Becoming engaged normally happens at the end obviously, but there are lots of reasons for it to occur early, I shall find my answer to the same question in my antenatal thread, hang on!
sounds worse than it is and I'm NOT completely insane! I run a class - outdoor fitness for mums and babies - so it ends up being my workout too. Would never advise one of my clients to do the same thing, but my body's so used to it by now that I think I'd go into total shock if I took to the sofa.
I'm perfectly normal and eat lots of pie too. Would be drinking plenty of wine as well if it wasn't for the obvious!