You can, does the prog cream have vitamin E in it? That is the main concept, when prog is dissolved in vitamin E it penetrates very well in the membrane because of how soluble the vitamin E can enter the cell so it can carry prog deep into the cells, while creams usually sit on the top and don't penetrate that well and are even severely underdosed.
Actually, does your bottle have the amount of prog in it too a lot of them contain 0.1% or less? I would suggest checking out health natura's prog, it is the one I use as well you can also rub it on your gums and you will feel effects within minutes too (b/c of the vit E).
Simply Progesterone 1oz