yeast infection?

my vagina has been itching like crazy for about 3-4 days now. it doesn’t hurt when I pee, and it comes out clear. however, i do get a crazy amount of white/clear discharge (to the point where it drips down my leg) or it soaks through my underwear and shorts. if i examine it more closely (i check by using a q-tip and sticking it up there), the discharge does look like cottage cheese... i just dont want this to be an std. :( i am 19 years old, sexually active, and i’m way too embarrassed to tell my mom about it because i just told her i wasn’t having sex. what do i do?