Weird sensation when tampon goes in.?

When I put a tampon in it doesn't hurt, but there is a weird feeling like it's pushing on something. And for a second I feel a farting sensation. After the tampon is in it doesn't hurt or anything. I can even feel it. When i am inserting the tampon I am sitting upright on the toilet and so its not like I am inserting the tampon at a weird angle. Is this normal?