Whats the deal?

ok, ive been stressed out for a while. my dad, my hamster, my sisters, my kittens, my boyfriend, and school. my boyfriend dumped me because he thought i liked my best friend! and my kittens ate my hamster (dont ask) and my dad is a non-stop complainer! ive been getting terrible headaches, nervous-like stomachaches even though theres nothing to be nervous about, and i have screwed up emotions. i would be depressed for one second and then hyper/happy another! my friends told my to go to the school deen to talk to her about these problems but im not sure yet. im 16! is this normal or is it something else?