Tell your dad..just tell him you need to talk to him. I had the same problem cuz I live with just my dad too,but don't worry,he'll understand. But if you still feel uncomfy call your one of your friends that are girs and ask them if they have any pads, you don't wanna use a tampon at first..just cuz... well email me if u need any more info @ Xrockgurl88X@aol.com