I retested 35 days after treatment for chlamydia. they did a culture and it came back negative.. am i clear of this std or is that too soon to retest? are false negatives a thing after antibiotic?

Unless: re-exposed, this should be a good sign that the treatment was effective.

Nucleic acid test: Culture for chlamydia has many false negatives. Nucleic acid test is better. While you at it, get tested for gonorrhea also. About 25% of people who have one have the other as well. Have a healthy diet, exercise 30 minutes/day, drink plenty of water, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Get HPV vaccine. Wish you good health!