very itchy and slightly swollen?

Hi,
Welcome to ehealthforum,
The symptom of vaginal discomfort, swelling, redness, and itching, that you describe could suggest vaginal infection. The exact cause can only be made out after careful evaluation. Consider visiting your doctor/gynecologist at the earliest for thorough examination and further evaluation (including vaginal swab/smear test done on the discharge) to look for the underlying cause for the symptoms that you describe. Treatment as indicated (based on examination findings and investigations results) would be started to help you control the symptoms. Avoid vaginal douching, or use of harsh soap or perfumes in the area. Use loose cotton undergarments and avoid use of tight fitting clothes. Avoid sweat accumulation in the area. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Drink plenty of water. Take adequate rest. Maintain healthy diet and lifestyle. If infective cause is detected, and if you are sexually active, get your partner also treated simultaneously, and avoid having intercourse while being on treatment to prevent chances of re-infection.
Take care.