you were on your period and Inosuke didn't know how to comfort you..

At first he started throwing acorns at you for no reason

Once he got bored with that he started to run around you in circles trying to make you laugh but failing miserably.

He soon though you were dying and ended up hugging you tightly not wanting to let go

But in reality you were just on your period and Inosuke doesn't know what that is...