Vaginismus :(

So. I think I have vaginismus. Im 15 years old. When I was younger, I never explored my vagina. I knew nothing about it, then I got my period. I tried tampons, but it seemed impossible. My friends said I simply wasn’t doing it right, but something always felt off, it felt like I was hitting a wall. I would get about 1 inch in when I would hit a wall. After months of trying I gave up. I’ve never been able to penetrate my vagina with, well, anything (I don’t want to go into specifics..) I can’t even enter a finger with out pain, it feels almost like a burn or sting. Like it’s stretching me out. It’s uncomfortable. And simply feels like I’m hitting a wall. I’ve tried talking to my mom about see an obgyn multiple times but she always says I’m crazy and there’s nothing wrong. It’s worrying me honestly. Does this sound like vaginismus? And if so, what should I do?