"Is there something wrong with me because im like this?"
Not a lot of information for extracting an answer, much depends on details which are not listed in your summary.
"...im very possessive of them and over protective,i freak out if my mum threatens to sell one of them..." !
What is it with mothers that they think that they can be so cavalier and disrespectful of boundaries? The penalties of being young and subject to a parent's whims. You are entitled to defend your 'possessions', as pets are at law. Would your mother approve of any other member of the family, or complete strangers, rifling through her belongings and disposing of whatever they fancy? Probably not?
What do you mean by "freak out"? Would your mother listen to anything less forceful or determined? Can you express your opinions in a more sober manner, and have them be respected?
It seems that your mother is doing a fair bit to "tread on your toes". Mothers do; they are odd like that.
Perhaps she should be less clumsy and less neglectful of your entitlements? Your youth is not an invitation to deny you the consideration and courtesy which she probably allows older people. However much right a parent has to give guidance and leadership, your youth does not mean that you are less entitled to the consideration which mother allows to others. Perhaps if she treats you better, you will be less... Less what? Volatile? Forceful? Frustrated? Exasperated? Backed into a corner?
When you have seen more of the world, and life, you will see that women generally make a lot of noise when wound up. That's a pity, and does not help with communication and resolving problems. So, you might not be as much out of the ordinary as you perhaps fear? Still room for lowering the volume, and reining in the force used in delivering your opinion, perhaps, but less of the problem that you think?
Answered Dec 14, 2012
Edited Dec 14, 2012