I haven't smoked any synthetic stuff, nearly did, but I have done the real stuff.... three times. Very much regret it and am never going near it again, worst bit is, I'm 13.... I found it hard to concentrate for a few months after, but it is starting to pass, although I think it has affected my depression (don't actually know if I am depressed or just being a teenager, so I'll just say normal teen moodiness).
But yes, definitely go see a doctor, just to be safe.
But yes, definitely go see a doctor, just to be safe.