Smoked some laced weed?

ok so one of my friends smoked me a bowl of some new dank he got, but ever since i smoked that ive felt like everything i eat makes me sick its been 4 or 5 days now. ive smoked a million times before so its not like this was my first time blazin up. so im asking is it possible this weed was laced or just a just a coincidence? if so what was it laces with that would make me feel like this? almost to the point where i want to throw up? anyway im sure ill get over it soon i hope, and just wanted to know if it could have been laced