Tampons

I’m 14 and can’t put in a tampon last year I went on holiday with my family and with my luck I was on my period we had already brought tampons just in case. After trying for a couple days I couldn’t put it in, on about the fourth day of trying I got one in then the next day I was still on my period but couldn’t put in the tampon. Everyone time I’ve been on my period since then I’ve tried putting in a tampon I’ve successfully done it once again.

Any advice?