Toddler mom, please help me

This current pregnancy was unexpected but I welcome it with open arms, but I am terrified of what’s to come. I have a 22 month old and she’s hitting the stage of tantrums. She’s also still attach to my boob and drinks milk from it, she also started co sleeping with my partner and I. I need help with all these things, how do you navigate tantrums, how do you stop your child from being attach to your boob and also have them start sleeping on their own. Please help or any advise?