Vaginal swelling after or during sexual intercourse. its never happened before but it's the second time this week.

Normal: This can happen under normal circumstances. If you're having pain, get checked out by your doctor. Hope this helps!

Using condoms?: If you are using condoms or lubricants, your vaginal swelling with intercourse could be because you have developed an allergy. Latex allergies are becoming more common and can be very serious. They can just cause redness, irritation, and/or swelling one time and result in anaphylaxis and death the next time so you should be very cautious.