How do you know if you get roofied?

I had 2 mixed drinks, which I always have at least 2 or more and then drink beer after but I can't even remember if I even moved on to beer. I completely blacked out except for a second when I was hysterically crying and my friends told me I threw up outside which I don't remember. My friend also said in the morning there was puke in the bathroom. I threw my phone and don't remember which is something I wouldn't normally do when I'm drunk. I ended up coming home by myself that night when all my friends had already walked back. I sent a lot of text messages that made absolutely no sense and I told someone I got d. I don't remember getting d so I don't really think I did but that's why I want to know if you think this is just for some reason getting too drunk off of equal or less to what I always drink or actually getting roofied. I know if someone gets roofied they p out but I don't know if I ped out and then got up and left or if I just didn't p out. Thanksssss