Can anyone help me please.

I’ve been itching really bad down below for the past 2 weeks, I’m scared I have an STI, so scared I’m hesitating on going doctors, because if it’s an sti that means my partner has cheated 😭😭 I’ve heard about yeast infections etc. There’s some pictures here, I’ve put on picture where abouts they are.

Update: been to the doctors it’s yeast infection 🤦🏻‍♀️🤣

Thank you for helping.