Sti or something else?

I’ve been having an intense itch in the area around my clit and the area where my anus and vagina meet for a few days and yesterday I looked in my vagina and in the area around the clitoris hood and clitoris I found yellow frothy discharge. My vagina itself tho looks okay. I took a cotton swab and picked some out and smelled it and it smells HORRIBLE, like feces almost. However I have had no pain/burning while peeing. And it only itches if I scratch at it... I can ignore it. Has anyone ever had this? I suspect it to be Trich. I made an appointment with my doctor but I need advice on what it could be and any remedies I can use to deal with it in the meantime because my appointment is in 7 days.