someone help me figure this out !!

Two weeks ago my boyfriend and I had sex (my first time), using the withdrawal method. I’ve been so worried about pregnancy, and to his knowledge, he does not have any STDs or anything like that. I’m a couple days late on my period, with weird discharge (see below). I also have an itching sensation inside my vagina, with a slight burning feeling if i pee? I’m so new to all of this, and symptoms of different diseases/infections are so similar i can’t tell the difference! can anyone help me figure out what’s wrong?