Your history of Bartholin's abscess
suggests quite a few things.
Bartholin's abscess is usually due to sexually transmitted infections, most commonly being Gonorrhoea
and Chlamydia. Your tests for Chlamydia are negative. What about Gonorrhoea?
Burning micturition, again swelling at the Bartholin's site and pain at the region indicates that you have got infection at the Bartholin's Gland. Though due to the marsupialization, the gland now does not exist, the tissue is infected. Particularly appearance of the small lump after intercourse is suggestive of Bartholin's gland tissue.
I would suggest you to get your urine examined first. If it shows infection, try to identify the causative bacteria by culture and sensitivity test on urine which in addition will reveal to which antibiotics the bacteria are sensitive. Also get the swab of the Bartholin's gland tissue (when your infection is active)for culture and sensitivity.
I have got a feeling that you have Gonorrhoeal infection; however tests will reveal. If it is gonorrhoea, both the sexual partners will have to undergo the treatment.
Your new symptom of bleeding after the intercourse needs further more explanation. Does the bleeding come from within the vagina or is it from the Bartholin's site? If it is from Bartholin's site, it should stop with the control of infection. If it is vaginal bleeding, you need to report to the Gynaecologist to undergo thorough investigations to rule out any lesion on the mouth of the uterus
, particularly cervical cancer
Please report all this to the Gynaecologist and not the family physician. You may further continue with me for more consultation by asking me a direct question after you have your suggested reports ready. I shall be available for you.
I hope this advice will help you for further management.