What Causes Swollen Labia Minora And White Vaginal Discharge?

My left Labia Minora has swollen up and my vaginal discharge is also very white. Had sex two days ago, but all was fine then. Itchiness started just yesterday but didn't realise something could be wrong.
Please help as my husband is not in the city right now and i don't know who else to ask for help.. :(