Birth control pills have not been shown to get rid of or shrink ovarian cysts that have already formed. Some studies show that the cysts shrink at the same rate with or without birth control pill use.
Chewbacca's voice was created by the original films' sound designer, Ben Burtt, from recordings of walruses, lions, camels, bears, rabbits, tigers, and badgers in Burtt's personal menagerie. The individual recordings were mixed at different ratios for Chewbacca's different utterances.
Raccoons can make noise. Should a raccoon get into the wall voids, it will make a lot of noise. Scratching to get out, crying sounds, and hissing are some noises a raccoon can make. Skunks will make similar sounds, along with a strong odor when trapped in a wall void or chimney.