So I Was Treated For Chlamydia Because I Discharge From

so i was treated for chlamydia because i discharge from my penis but the next day the results came up negative. But after the shot and pills my stomach began to hurt along with my groin and ever since then lower back has been hurting along with sharp nerve pain in my legs down to my knees. And a acheing pain around my groin. And the left leg but right side of my knee is tender to the touch on the skin with a slight aching pain in the knee. Discharge went away and hasnt came back. Any ideas, im freaking out!