hello and welcome to HCM forum,
i am glad you posted your query,
i would like to inform you that if you that the tissue that is bulging on the inner side of your cheek is nothing but the soft tissue
which was bit by you accidentally while sleeping , it will take approximately 3-5 days for the tissue to revert back to normal.
i would recommend you to visit your dentist
if the check is hurting too much, a topical gel will provide relief.
use an antibacterial mouth wash(twice/day) for 1 week, to avoid chances of infection.
i hope i answered your query,
i wish you good health.