I didn't know where to put this so...

My mom was just crying and ranting to my dad and I feel like it's my fault cuz I opted out of dinner cuz of then fact I'm already over my calorie limit for myself telling her I'm not hungry (I'm really not tho so *shrug*). I was with her all day and she was happy and everything do I feel like this is completely my fault.
I mean she seemed upset by when my dad didn't let me change the storm door to a screen but she wouldn't be crying and ranting this much (over and hour straight).
I don't known what to do. I don't want to ease drop.... And I don't want to ask what's wrong I'm to scared she'll get mad at me....
Idk what my goal of this post is I guess just if you have had a similar situation tell me...

Wait I just heard cuz I started listening in (heh) she's upset cuz "no one helped with the chores" even though we all do. This happens all the time. She gets allll upset cuz "I DO EVERYTHING IN THIS HOUSE" even though literally everyone else has done things. She saw dad vacuum everything, she saw me pick up the rooms and dust. Like what?

And this makes me feel like she isn't thankful for what I do, and that I should have done more, and such. I did everything she asked of me but I feel like she's ungrateful of me. I feel inadequate and unloved.