Hissing hamster - YouTube
This is hamster hissing sound, right? My hamster hissed once while he was asleep. I woke him up.
I remember my hamster started biting me as well and attacking me. He bit me so hard I was bleeding and he didn't let me go. I had to shake my hand to get him off of my finger ( I don't know if it's allowed to do so or how to behave when a hamster bites you) and I don't know why he was attacking me. It broke my heart. I left him alone for a week and only put food and fresh water when he was asleep. Then a week later he was friendly with me again.
Based on my experiences I'd leave the hamster alone for awhile.