First off, we can't tell you what you did or didn't take, because it's impossible to know and pointless to speculate. If you want to know what is in your "mllie" (molly?) then there are professional lab testing services available, or testing kits. I'm afraid there is no other way.
I'm having trouble understanding your post. So was it a few days ago, or one day ago? And are you trying to say the drug 'took effect' a day later, or that you're just still experiencing the effects? Or is it just that you're just freaking out/a bit paranoid (is this what you mean by tweaking)? It's not clear, so hard to answer your queries.
That said, if you think you've been "tricked", as in somebody intentionally tried to make you feel this way, then I doubt it. Sometimes people sell various stimulants/etc as MDMA, and it is possible that you have taken some kind of stimulant, but again, impossible to say for certain, or what it might be, and I doubt somebody did it for any other purpose than to make money/because they didn't know any better.
Either way, it just sounds like you've taken drugs and need to calm down and get some sleep. Weed is notorious for causing paranoia on drugs, especially if you've been up for a while and can't sleep etc.
I've got no idea what you mean about everything going black. Maybe it's some kind of anxiety/vertigo type thing, but I really don't know. If you're concerned for your safety, then check yourself into a hospital; that's what they're there for.