Hi there jennifer. it appears your problem may be 'mechanical' & friction related. It is also possible that the chlamydial infection has not totally resolved. I would advise you to check for the herpes
antigen too (if not already done so). please visit your dermatologist
or gynecologist. A lubricant with an antibacterial component may help prior to sexual contact. It is red & swollen on account of some local 'inflammation'..be it microbial, fungal or mechanical. Do take a one time dose of a 150mg fluconazole-2gram tinnidazole combine. wish you a speedy recovery. Cheers!