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?

It's definitely advisable to continue breastfeeding your baby even when you are sick. That's when your body produces more antibodies which will be passed to your baby when you breastfeed. And I would encourage you to latch directly instead of giving ebm as some antibodies will be lost as compared to direct latch. You may want consider wearing a mask when you are with the baby. Always ask the doctor for breastfeeding safe medications. You may want to wait till baby is born before deciding buying the FM. Reason being when you are in the hospital after you give birth, you can request the nurses to feed baby with FM if you are not producing enough breastmilk. The nurses will recommend you a suitable FM brand for baby. At this juncture, you wouldn't know which FM is suitable for baby. :) You can keep baby by your side and latch baby every 2-3hrs so your colostrum can faster kick in. When you are in the hospital, request for the lactation consultant to teach you how to properly latch.