itching down there ?!!!

i’ve been having a lot of itching down there like inside. i don’t have any weird discharge or smell everything else is normal just the itching. could this be an STD or maybe yeast infection ??

did anyone who’s had an STD have lots of itching before finding out they had an STD?

i’m going to make an appointment to get checked but i can’t call till monday so i just want some comments on what it could be