Hello,
Welcome to Healthcaremagic,
Probably your Intense sexual activity may be the cause for both Swollen
perineum, anal and
abdominal pain.
Because you both had both vaginal and anal sex.
It is advisable to use the lubrication while having vigorous sexual activity to avoid injuries to vagina, perineum and anus.
It may also be due to Herpes infection or
fungal infection.
If you have any
vaginal discharge, Fever, Shivering or malodour in vaginal discharge, please consult a gynaecologist.
Hope this helps.
Take care.