This is really embarrassing😭

For some reason I tend to sweat ALOT. I can't wear certain shirts because I'll put it on and in a matter of two minutes my sweat will go right through. Idk why this is and it's very annoying because I'm a 17 year old girl who sweats more than the normal amount. The other day I was just laying next to my bf in a tank top in the freezing cold and he felt my armpit and he was like "are you sweating?" And I said "yes it's very hot" however I was freezing my ass off. Does anyone know why this happen to me 😅 and if there is anything I can do about it?