anyone else experience this at work? mean girls

I work in a government building, we are supposed to be professionals, I dress nice and am always friendly to anyone I meet, 

Right now me and ten other people are in training, were also have 180days of probationary period, well some of the other trainees are just not pleasant to work with, they give dirty looks and tell little secrets not knowing that cube walls are not very sound proof, 

Maybe it's because I'm 20 so I'm literally the youngest in my 2 floor unit every one else is 25+ I'm not immature I'm at really responsible, that's how I got the job. But these other trainees make me feel like I'm in high school again I feel bullied or just look at as if I am uneducated. I'm trying to not let it get to me but I did say something and so did 2 other trainees to our trainer/suporvisor , we did not say any names I just told them to watch for it, I told her I didn't want to seem as if I am complaining or that I can't work with certain people but it's making the job environment different .

I mean we're all here to learn, we all make the same pay we will be away from each other in 80days but right now I just feel paranoid as if every time they start whispering it's about me and how I mentioned the situation to a trainer.