Probably... don't tell anyone that you saw words in your hair, if you don't want them to dose you. They'll up your meds and try to sedate you. It was likely just a hallucination that will pass. I think you probably know that, and maybe have had them before? Quite a weird one though, I'll give you that... yeesh.
Just ignore it for now. But if it starts getting any worse than that and seeing some more, you might have to figure out what to do next. Don't want anything worse to happen.
I'm starting to get the feeling that you've had some really bad things happen to you... take care. I hope that things will stop being so weird for you soon.
I'm seeing green spots at the moment, but I think they're fine. They're not trying to send me messages or do anything creepy.