Thanks for choosing health care magic for posting your query.
Yes theoretically speaking you can become pregnant even if you rub the precum around your vagina. But the chances are very rare. You have also taken the morning after pill and that makes the chances too too negligible.
Please try to be careful next time. Other than the pregnancy
you should also worry about the STD
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
In future if you wish to contact me directly, you can use the below mentioned link:
Wish you good health,
Dr. Srikanth Reddy M.D.