Thick Green Discharge After Sex

Hey guys i need some help. I don't want to gross anyone out but I think I need to put a pic here too so please don't look if you're easily disgusted. Anyways today me and my boyfriend had sex and I went to pee afterward and discharge that looked like a booger came out mixed with a little blood. Literally it was green and I've never had green discharge before. Also it was super super thick. I'm pretty sure it's an STI or some kind of bacteria but I'm not sure what. I'm gonna go in and get tested again even though I've only been with him and we're both STI free. Maybe the tests missed something? Maybe it's recent? Anyways planned parenthood will test me for free but they only test for chlamydia and gonnorhea so should I test for something else?