skin issues

Man, I don't know if it's my foundation or if it's just nearing that time of the month, but I have been getting small pimple like things all over my face D: They're like the ones that are small and not really pimple like at all, but still a blemish? I don't know how to describe it. The foundation I'm using isn't known to cause break outs...:/ and like 90% of my face is okay after using it. Ahhhh I don't know ;_;