I am going to labour in the early November, should I buy one tin of FM just in case I have not enough BM? What if I am having fever during BFing, can I BF my LO?

Yes I would advise you to get a small tin to standby in case not enough breastmilk. But do note that some babies are allergic to cow's milk. Mine was and he had super watery poop... Until I switched to soy fm. Advised by pd was bm is the best option