Ahhh mama, I totally feel you, the constant breastfeeding at that age is absolutely draining, and your husband needs to understand that burnt out mama is not good for anyone either. A few of us mums tried sleep training around that age and honestly, the first few nights are the hardest but you gotta stay consistent or else it doesn't work, so maybe sit down with your husband and explain that the goal isn't to ignore the crying but to help your son learn to sleep independently for everyone's sake including his. Since he's worried about the serak suara thing, maybe you both can agree on a gentler method like checking in every few minutes instead of full cry-it-out, so he feels involved and less anxious? Hang in there, this phase will pass and your back will thank you later!