Okay, so now that you have been dealt the bad news...
Please, please, PLEASE do not take it. I know what its like to be in a situation where you just spent your last dollars on what should have been a great time. And believe me, it's not worth the damage you're going to do with an unsure chemical. Let's say it is a pipe, or dxm, still, even knowing that, you don't know what else is in it. And any asshole who would sell you something like that, why trust that he sold you something that won't kill you? I'm sure you are a reasonable and intelligent human being, and you will make the right decision.
Just be thankful you bought that test kit. Seriously could be the difference between life and death.