Most likely this is a house bug or centipede. They dont bite, they are just annoying! If it doesnt have spikey things sticking up and lots of legs and can move really fast its not this and its probley just some kind of worm.
i forgot what its called but its dangerous so go to vet immediately
a inch worm
Maybe a tape worm, or an over-sized maggot.
Wood Worm. :D
Canker worm
1 inch to 85 feet
the tape worm can be as long as 2fett and as short as 1 inch
inch worm
tube worm
The description matches that of a bagworm larva, typically belonging to the family Psychidae. These larvae construct protective silk bags or cases around themselves as they develop. The movement pattern you described is consistent with how bagworms move, resembling an inchworm-like motion.
A gummy worm is about four to six inches long for the ones that look like real worms. They also make shorter worms that may be an inch or so long.
The right way to say inch worm in Spanish is, oruga