I think something is wrong with me?

Ok so i think this happened to me atleast 4 maybe more times throughout my life, so i am 16 years old and the first time it happened i was around 8, then i was 14 and now when i am 16. It feels like i am not in my body, i felt like i was in a dream where i have no control of my body, like i know i'm doing it but i can't feel like i am doing it. The last time this happened which was 2 days ago was when i was eating with my friends after school and we were all eating chips and suddenly i couldn't feel myself anymore i was feeling numb i couldn't really see if the chips were hot or cold it just felt like nothing when only we got the chips made fresh and really hot. And i felt like i was in another p.o.v. When i was 12 it was when i was with a childhood friend and we were waiting for the bus to come and it happened again, the wind was blowing but i couldn't feel it i just didn't feel like myself. When i was 8 it happened at a party with all my childhood friends and i felt numb.

I don't know if i should be concerned or what? Has this happened to anyone else before? What do i do?