Occupy Wall Street protesters are flocking to nearby health clinics for STD and HIV testing after getting their freak on in ’60s-style hookups with crusty strangers, sources told The Post yesterday.

“Last week was free love,” said a medical professional at a clinic located a short walk from Zuccotti Park, referring to the number of people who organizers have referred for sexually transmitted disease testing.

A volunteer at the park admitted concern among protesters about STDs.