Likely to be a minor tear.
Thanks for trusting us with your health concern.
From your description it seems that you have a minor tear in the posterior part of the vaginal opening. If there is no active bleeding in the area then it is not likely to be a deep tear.
Superficial tears do not require surgery and heal with minimal treatment.
There may be small amounts of bleeding over the first 24 hours, but this usually stops by the next day.
Avoid douching and sexual intercourse for six weeks. Be careful to use adequate lubrication during intercourse next time.
You can do a hot compress in the area to reduce the pain and congestion. Do take a mild pain killer like Ibuprofen/ motrin
for pain relief after every meal.
You can apply a topical antiseptic cream like Neosporin
till the time you consult your doctor. This is likely to heal in 2 weeks.
Please feel free to discuss further. I will be glad to answer the follow up queries that you have.
Wishing you good health.
Dr. Rakhi Tayal.
For future query, you can directly approach me through my profile URL http://bit.ly/Dr-Rakhi-Tayal