wtf causes vag dryness,stinginess and burning?!

i still havent gone to a diff gyno yet. But the 1st one ran tests and sad everythng was fine but i feel like shit. i have no partner,☠️dont finger, but gyno said it might be external factors such as tight undies,lack of water etc, . i changed to cotton,drinking way more. but it feels worse, tbh im tired. i told my mom i wnated to go to a new gyno but she bought me pills from FINELAND such as candifens. she said to wait and i might get better. but it hurts to walk,workout and its so bothersome