I'm facing a situation where the child sucks on my breast when going t…

I'm facing a situation where the child sucks on my breast when going to sleep. He drinks all the milk from two and then cries again, wants more, and doesn't fall asleep. Then I sit waiting and start sleeping again, fixing it. (If someone says maybe it seems like there is no milk, then there isn't. I know when I have it and when I don't.) Has anyone had this? Should I still give him formula if so, how do I not see that he doesn't take the bottle in his mouth and everything rubbery he doesn't take, spits ???