STI???

Okay so about a month ago my bf and I had unprotected sex (Ik ik I should’ve been more responsible) I really didn’t think much about it but a two days ago I noticed my discharge was insanely watery and a darkish yellow and yesterday it turned to weird neon green and it a bit clumpy. I googled my symptoms and it sounds like I could have an STI which isn’t anything major but I’m embarrassed to go get checked. Idek how to get checked like do I just walk into the clinic and ask or do I make an appointment? Any tips??