Jorke

So first things first I had to tell that I'm new to meditation stuff. I think I have been regularly meditating for 4-5 months now. And every time I have different experiences in meditation. Some good some bad, but oh boy todays was different and I'm still shaking. So as always I sit on the floor and start meditating. Letting my monkey mind run as always... Some time later like five minutes in I started to see some funky images and flashy colors in my mind. Seen some old terrible nightmares' flashbacks. I have now no idea what I have seen exactly but mate it was terrifying and yet so familiar. I have never felt like that before in meditation and I have never been that scared in my whole life! Is something wrong with me? Has anybody experienced stuff like that before? Did I do something wrong, any ideas?

Thank you all for replying and make me feel good again. Yesterday I was worried, but now thanks to you @Piotr and @Piotr I feel more relaxed and eager to do meditation even more. Also it is always nice to know other people having same experience, so thank you as well @Pelin for being supportive in that way. Thanks again mates.