It's not only MIL, my own mother gives me alot of stress too. Don't take whatever they say to heart. After giving birth, there's alot going on, have to really shoulder on when the going gets tough. My baby was in NICU and very difficult to take care since birth till at least 8 months old. No helper, No in-laws or parents' help except for the 1st month and during some weekends. Sometimes husband is just like a big kid so after having a little one, you just have 1 BIG kid and 1 little kid to manage. You can try talking to your husband that you need help from him (not just playing with the baby). For me, I just have to constantly 'remind' him on his duties too (not just earning $$). My hubby did sound out to me that it's baby all the time and he feels neglected. So, mummy do Take Care! Your physical, mental, emotional health is important so that you have the stamina to bond and grow with your baby. It's a long journey! Have Faith.
Btw, I am my baby's main caregiver but my baby simply adores daddy more, call him first too! I am perfectly fine with it too, because there are also times my little one cuddle and cling on me. So, your baby will not reject you. Don't worry, it just take time for baby to adjust to this whole new world. It will take time for you and your hubby to adapt to your new roles too. Have patience.