My KITTEN's tooth fell out by accident?

he's approximately 6 months old....but today when i was playing with my kitten with a towel and he kept on biting it and not letting go....like 5 mins later i saw blood on my t-shirt and something tiny fell out and hit the ground...i saw it was his teeth?!!! i didn't know if it was wobbly or not before because I never checked but maybe it's because he kept on bitting the towel and not letting go and i kept on pulling it back the other way? what should i do? my parents is quite angry because they thought that I did it because i kept on pulling the towel hard that it made my kitten's teeth loose and fell?helllpp! i feel so guilty now!!!! is it serious?