Breastfeeding mamas! I need some advice

So I have two kids. My daughter was formula fed. My son has been breastfeeding exclusively since birth and he’s 13 months. He eats breakfast lunch and dinner foods but during the day he’s still breastfeeding all the time and don’t even get me started on the night feedings. It’s still almost every 3-4 hours. Im fine with it but I also just found out I’m pregnant with our THIRD!!! So of course the nips are sensitive and I’m just extra emotional and worried about contractions etc. I want to ween him off completely but have NO idea how to do it because he uses me to eat, sleep, soothe, you name it. He’s a boob guy.

Anyone have some tips for me?