If I have mild pelvic/vaginal congestion will having a labiaplasty make the varicose veins in my vagina and pelvic area worse?

Labiaplasty should not make your pelvic / vaginal congestion any worse. But if the congestion affects your labia, there might be a potential for more bleeding from the wound following the procedure.

For optimal outcome, please consult a fully qualified plastic surgeon, who has specialist qualification in plastic surgery 'FRCS Plast' after having being trained adequately in the field of plastic surgery, is registered on the 'Specialist register for Plastic surgery' with the General Medical Council and has been considered competent enough to be a member of the 'BAPRAS' (British Association of Plastic Reconstructive and Aesthetic Surgeons) and 'BAAPS' (British Association of Aesthetic Plastic Surgeons) at the least.

Having varicose veins or pelvic congestion should not stop you from having a labiaplasty procedure. A labiaplasty will not make them worse.