Is it normal for my parents to doubt me for everything i do?

My mom's left us (me and my siblings) twice now... She came back, finding out I have extreme depression, anxiety, etc. She just gave me a bunch of pills and basically said "Deal with it". Even though, I had a suicide attempt when she came back. (I don't have thoughts of suicide, even though I have depression now...). Everything I do, my parents doubt me. I can barely hold a pair of scissors without them looking at my strange. I can't look out the window because I'm "waiting for someone". Whenever I'm online, they think I'm looking for someone to fuck. Or to run away with. Whenever I go to school, they think I might be ditching, whenever I go to a friend's house they think I'm fucking my friend's older brothers. This all started at a young age, maybe 9. Whenever I tell them about an event they think I'm lying. Whenever I even look at someone in the eyes, they think I'm plotting someone. Whenever I open my mouth, they're just waiting for me to say something bad. Whenever I ask for something, they ask "Why?" and that's logical. But when I do tell them, they say "No, tell me the -real- reason."... People tell me it's normal for parents to be worried. I'm not sure anymore. so.. Is it normal? Keep this in mind. I'm a straight A and B student. I've never gotten suspended. I've never brought a boy home. I've never gotten in trouble with the law. I am not an only child, and I am the only one doubted.