Weaning 15 month old

C

We have an amazing, rambunctious 15 month old boy who refuses to sleep without the boob. I know he can fall asleep without it because he does at daycare but he refuses to do so at home. Naps are only done if I nurse him and hold him. I am waking up every 2-3 hours to nurse him back to sleep. My husband tries to settle him at night but it never works. We were managing with all of this but now I’m pregnant and can’t function during the day with such little sleep and no coffee anymore (I know some coffee is fine, just a personal choice to cut it out while pregnant)

Anyways... we need help trying to gently wean our little guy so mama can get some sleep— any advice??