How do you manage??

Hi ladies, I have a question to ask all of you on plus size pregnancy. I am 100+ kg and already have a belly. I am ttc for my 1st baby and I always get stressed about how I am going to carry the baby. My back will break 😱 how will I continue working till the end (I am planning to do so), will I be able to sit, etc, etc...Can you please share your stories and experience on the same. It will be a huge help for me.