According to the Safety Data Sheet Elmer's site, if applied to skin, " ...wash immediately with plenty of soap and water. Get medical attention if irritation develops."
If finances are an issue, I feel you girl. Here are some charcoal masks at different price points.
If DIYing is your thing and you just want to mix something up, you can get some activated charcoal powder and mix it with another clay mask to get your desired results. Here is a highly rated one here:
Do not put glue on your face.