I'm glad you are feeling better today and reassured that you have a normal pup.
I always post pics and stories about Duggie and how great he is, etc, but I have actually been keeping a secret - I have the Puppy From Hell!
He has been ankle biting since day one, I am always covered in cuts and bruises, and can't walk across the room without him starting. But now he is guarding, and what a nightmare he is!
Everything gets guarded, socks, food, chews, even my shopping yesterday as there was carrots in the bag.
Poor Tia is scared to walk past him when he has a Kong or a chew, I don't worry though as he is easily distracted by better things and soon drops whatever he's guarding, and I can take everything off him, but he finally went too far tonight, and actually really went for her when she dared to even walk past his chew.
So, all chews went in the bin with him watching, and he won't be getting any more. OH has been told not to leave any socks lying around, and nothing will be left within his reach.
So, don't worry, you're not alone, even my "angel" is a devil at times, but I know he will soon grow up and be a lovely dog, as he is lovely about 75% of the time. I can see why people panic and despair though with their pups, as when Duggie is being like that he sounds very aggressive and nasty, it would be easy to think he was a problem dog.
A lot of us are going through it with you, so there will always be someone on here to listen to you and try to help you.