My big toe nail fell off from me stubbing my toe going on two months now looks like a new one growing is there anything I should put on it like cream?

Antifungal in case. Sometimes, when you remove the barrier to fungus, it "takes up shop" there and causes a fungal infection. The last thing you want out of this stubbing incident is a fungal toenail. I suggest using topical lotrimin (clotrimazole) on the area.
No. If growing out normal with normal color no need to worry. Big toenail takes about a year to grow out.