When you say rest, what do you mean? 'Not working out'? In terms of what kind of effect it will have, depends on how you live your life. What were you doing when you first started experiencing pain?
While it is difficult to suggest particular courses of action without knowing more of the situation, and who you are, I can definitely suggest something broader, which may have more long term impact. Follow your sensation. Obviously you have been to a degree, and maybe you can take it further.
- Very slowly and gently, experiment and play with finding where you can move with ease.
- Sort for pleasure, rather than pain, if that makes sense.
- Pay attention to your breathing, and when you can breathe easily, and when it catches.
- Find out what your pelvis is doing, and when it stops moving in an action.
Hope this helps =)