You drew a lady smiling while you were pissed off? That actually sounds like the right idea when upset, to draw something or someone being happy or smiling can make one feel better I think. I really like how calm she looks too. The yellow background gives the impression of it being bright and sunny outside or that she has yellow walls in her house.
Adding to it, the yellow hoodie gives the image a nice color theme going. Also, with her hand, I'm going to assume she just snapped her fingers or something in response to what someone said or while she's humming.
Overall, looks quite nice.