What Causes Itching Along With White Vaginal Discharge?

Hi I used a new soap down there on fridah 2 days after coming off, then had sex at the wweekend (Fridaynight) and after a day became a little ichy, (Sunday) then today I was fine however just now i got really ichy and now I've swollen on 1 side! Its huge! I've had white discharge, but I've just bleed a bit, should i be worried ? What is it ?