Vaginal burning and frequent urination after intercourse during pregnancy can happen due to irritation from friction, dryness, mild urinary infection, vaginal infection, or inflammation of the urinary tract. Pregnancy itself increases the risk of urinary and vaginal infections because of hormonal and body changes. Since your symptoms started after intercourse, mild irritation may be one cause, but frequent urination with burning can also suggest a urinary tract infection (UTI), which is important to identify and treat during pregnancy because untreated infections can sometimes affect both the mother and the baby. For temporary relief, drink plenty of clean water to help flush the urinary tract and avoid dehydration. Maintain good genital hygiene, wear loose cotton underwear, and avoid scented soaps, vaginal washes, or antiseptic products in the area because they can increase irritation. Avoid sexual intercourse until the burning settles. Do not take antibiotics or vaginal medicines on your own during pregnancy without medical advice, because not all medicines are safe during this period. It is advisable to consult your gynaecologist or doctor soon, especially if the burning continues, worsens, or is associated with fever, lower abdominal pain, foul-smelling discharge, blood in urine, or severe discomfort. Your doctor may recommend a urine test or examination to check for infection and prescribe pregnancy-safe treatment if needed. Early treatment usually gives quick relief and helps prevent complications during pregnancy.