why tampons hurt me more than others.

i’m 16 years old. i started using tampons a couple of months ago because i went on a trip to the beach so i had to. i’m very sensible down there and i was so scared of getting something inside of me. i couldn’t understand how my friends used it so normally without any pain. on this trip to the beach all my friends helped me and it hurt me so much and it was so uncomfortable but i had to use it. i used them all week but it still was so uncomfortable and couldn’t understand how people did it so naturally. to this day i try to get use to them but they still give me a hard time and sometimes i can’t even get it in. it feels so bad like i’m getting injected and getting it out is like pulling all my organs out, i don’t know i just know i have tried so hard of getting use to them and it hurts the same every time. i’m i doing something wrong? do i have something different?