Two travellers threatened me? Please read..I'm so scared?

I was walking down town with my friends today talking and not paying attention to my surroundings and then one of them rammed past me and nearly knocked me over..I automatically said ouch that was really sore..then the two teenager girls (clearly travellers) came up to me and started saying they were going to break my face in and I wouldn't have a face when they were finished..I was in shock and didn't say anything so they walked off to this woman who they were walking with before (I think) sorry that this is so long but I'm really scared of what they will do if they see me again and I'm scared they might hurt my family..Please reply because I'm worried and I can't sleep ): ps I'm not racist, they are known to be travellers