is it normal to be scared of?!

well this is kind of a weird question but im afraid of two weird things :S so well the two things are pointy leafs and horseshoe maggnets ! i dont know why but its like certain shapes freak me out and i feel like running away crying when i see them ! i dont know why ! they just scare me like crazy ! i actually have nightmares about them !!! i dont know why im afraid of them though ! when ever i see them i freak out and like scream and run away !!! my mom thinks im weird and that im faking about being so afraid of them BUT im not! it makes me scared that one day shes gonna bring in like a ton of magnets and leafs and put them in my bedroom! so please help me ! were starting a project in science in a few weeks with magnets in it ! i dont want to be made fun of !
- thanks