Why do I have OCD?

So I think that I have OCD. It is majorly annoying and interferes a lot with my life. I guess it is not too bad, other peoples are way worse, but it gets really annoying. I probably just have a minor case.

When I was younger I hated when people looked at me. I picked my eyebrows and eyelashes.

Anyways some of my symptoms now are: -I wash my hands all the time, they get cracked, red, and sometimes bleed. -I count my footsteps. -I can not step on cracks in the sidewalk. -I have to sleep a certain way. -I brush my teeth with the same amount of stroke on each side of my mouth. -My food can not touch each other. -The TV and radio volume have to be on an even number. -If I do not right something perfect, I rewrite it until it feels just right. -I do not sit on the toilet seat in any public bathroom. -I can not eat around people because if they make a noise chewing or something, I freak out. -If I touch something with my left hand, I have to touch it with my right hand too. -When I read, I have to read the whole page without making an error..If I do, then I have to start the page all over until I do it successfully.

I have more symptoms but I am not going to keep going on.

I am also afraid to have a baby when I am older, because I think I am going to die in labor. I am afraid of getting cancer since my grandma had it.

I do a lot of things because I feel if I don’t, something bad will happen. I have had images of stabbing my mom, cutting myself, my parents dying in a fire, sexual images, etc. I feel like those images will come true if I do not do certain things.

Come on, I am only 16 and every little thing bugs me. I don’t know what to do?