You should certainly tell your parents.If you have been a bedwetter before ,it may be coming back (that can happen as you get older) ,for any number of reasons.If this is the first time you've had this type of trouble ,perhaps its just your body ,growing too fast.Either way ,you should be checked by a doctor.I would ask for goodnites underwear ,they can be worn with boxers ,and remember : you're not alone.As you can see there are many 15 year old boys ,that still wet.Good luck