going back to work and EBF. What was your emotion?

Ok my baby is about to be 5 months i am EBF i will be starting work next week on monday...what was Your reaction emotionally how did you ladies feel? And babies reaction? So far my baby is so attach to me he even crys when he doesnt see me around so lets see how that goes emotionally i feel sad 😭 and i am a lil concern i mean my older sister is going to babysit my son im just going to work part time but she haves a 2 year old daughter she really doesnt listen i used to babysit her and all she wants to do was carry the baby or feed him what she was eating so i had to be very careful with her i know shes small and she doesnt know well i am just concern that my sister might get to comfortable and leave the baby where my baby niece can reach him...😭...