I did ecstacy that was probably laced, can anyone help me identify the unkown dr!

I did ecstacy that was probably laced, can anyone help me identify the unkown drug?

I did ecstacy for the first and ONLY time last weekend, and had a bad trip. I saw blurry figures with defined skin tones, shirt colors, and pants colors, but no distinguishable facial features. When I shone my flashlight on them(it was pitch black in the middle of the woods), they would either dissintigrate or bolt off running faster than humanly possibly. They spoke in gibberish(which I heard as if it was inside of my head, since it actually was). Two of them ran towards me, transformed into streaks of blackness, and went INSIDE of me. I could even feel it(slightly painful).

One of my friends saw cars, which would disappear when he touched them.

I am no expert, but I believe that X only has occasional, mild hallucinogenic effects. Since I heard, saw, AND felt hallucinations, I am quite concerned about the pills I took. Does anyone have any idea what I may have taken?

I know what I did was stupid, so I would apprechiate helpful answers and not lectures. Thank you.

1 week ago
EDIT
-In the morning, it felt prettty much like a massive hangover
-I took 2 pills, one a few hours after the other
-I felt euphoric and experienced most of the normal ecstacy effects for most of the time, the part I described came hours after taking the pills.

1 week ago
-I did not experience anything out of the ordinary after the hangover-like feeling was over(took about a day to get over)

6 days ago
BTW. Thanks to everyone who has responded.

I initially thought that LSD might be involved, but I am not sure why anyone would lace X with LSD, which(correct me if I'm wrong) is more expensive than X. DXM sounds most plausable.

Honestly, there could be TONS of reasons for what you experienced. First of all, it was your first time. Secondly, you took TWO pills on that first time, and thirdly, you did that in the pitch black woods, which was probably not the most "reassuring" setting for you, and how comfortable you are with your surroundings when you take it actually has a big effect on how you will react.