Is my dog going through the terrible twos?

EVERY night he digs on the bed which he finally ripped the sheet today and will just start biting me not real hard but its its really really annoying..i mean so annoying that its causing me some serious anxiety. He was really good when i first got him but lately he has been testing every limit possible. I try to yell at him but it just makes it worse he has like 397937 toys and i take him to the park to run for atleast an hour every day. Am I doing something wrong? is this a sign of things much worse to come or is it just a phase? He is 9 months old.