My parents are nuts when it comes to my education.?

I'm 14. My mum is really angry at my dad lately so they're hardly speaking. Anyways my cat died last week and I stayed home on Monday because I was too upset because I saw it happen. On that day my school gave out parent-teacher interview forms and the next day all the teachers had their slots full. So my mum just asked me about it and I told her that and now she thinks I'm a liar and that the slots wouldn't have been full. My dad, trying to get on my mum's good side after killing my cat, drones on about me to her and makes it sound like what I've done even worse. They're crazy about the parent-teacher interviews because I got mostly B-'s on my report card last year and they got really angry at me. I feel like they expect me to be perfect, I admit I probably could have tried harder but B- is not that bad. My dad always makes things I do seem worse so he can suck up to my mum because they're always fighting and it's usually because of something he does wrong. I can't arrange a parent teacher interview now obviously so my parents are going rank and I'm having ...trouble dealing with the stress. My parents always make a big deal out of something I do wrong even if it's just a little thing. One night I was cooking some chicken for myself and my mum told me to put the rest in the freezer in glad wrap. I asked if I could just put it the plastic bag it came in and she got really angry and said why can't I just do as I'm told right away. So I said why are you getting angry and she got all up at me for being ungrateful and walked into the kitchen and unplugged the cooker and put my food in the bin and said I wasn't allowed to eat anymore food from the kitchen. I had to go to school the next day and ask my friends for food because I have no money.