Itching and burning around the vulva that returned soon after stopping the medicine you were on earlier most often points to a yeast infection, which is very common in pregnancy because of hormonal changes. Your normal routine and culture reports are reassuring, and this pattern does not usually affect your baby.
Next Steps
Please see your gynaecologist this week so they can examine you and decide if you need that treatment restarted or a different one, since not every antifungal is used the same way through pregnancy. Keeping the area dry and wearing loose cotton underwear can ease the itching meanwhile.
Health Tips
Get checked sooner if you notice sores, unusual discharge, or pain while passing urine.