I like it rough, and the first few times, yes it was painful.
It does depend on what happened during and if it's still hurting downstairs, then it may have been a little too rough and possibly not lubricated enough either. While your hormones are all over the place during sex, you don't really feel if anything is hurting, or the hurting actually feels quite good ;) but afterwards.... ouch.
For delicate areas such as the breasts and the labia/vaginal area, it can take up to two weeks to heal completely as they can get bruised very easily.
If you are feeling 'odd' and are worried about pregnancy, then by all means do a test, please!