Is this an STD/STI, or am I pregnant?

I have very pale brown, creamy discharge- picture like, liquid foundation consistency. It doesn't always burn when I pee, but I do get random bouts of itchiness. I tried to have sex with my bf and when he put it in, I was in excruciating pain just at the vaginal opening. I looked it up on WebMD and it said it could be PID (pelvic inflammatory disease) but also that color discharge could be from implantation (aka I'm pregnant). Has anyone else had these symptoms, and can help me figure out what this is?