I would first number the hots, then turn them all off and turn them back on one-at-a-time to figure out where each one goes and get that all written down. For example:
1) bathroom light
2) bedroom #1 outlets
After that, I would turn them all off once again and disconnect all hots and neutrals to be checked and matched. At that point, I would check all the loose wires to be sure no stray voltage is coming back through any of them, and then I would begin checking for continuity to see which hots are related the which neutrals.
If you are not absolutely certain of being able to do all of that in complete safety, hire an electrician who can.