My tooth is broken in half, what do i do?

My tooth broke into half 3 days ago. 2 days ago my first half fell out. Before my tooth broke in half, it was wobbly. Anyway my other half is wobbly but it's not really loose to pull out. The only reason i am trying to pull it out because there is another tooth growing on top of it and i am scared if i get an infection because my tooth is in half and the first half has felt out. I don't know what to do. I am freaking out a bit and i keep on getting nervous about it. Can someone please give me some advice. Thanks.