Mum, being stress is not good for your health condition. Speak with some one. Your spouse is the best one to speak. Make plan with him. If you are working . If your MIL is helping to take care your baby . That would be better than sending to infant care or finding a good nanny. But remember this. Baby is yours and you can make any decision.
I think ur hormone is raging hence you are more Emotional . Your mil may think you will be worried of who’s going help take care after birth, hence offering her help (which is a good thing). On the other hand, whether you want to let her take care anot, is entirely up to you & ur hubby. No one snatching your child away.