fighting with my toddler

i had a terrible day today. woke up at 3am to pee and wasn't able to go back to sleep. talia woke up at 6:30 and i brought her downstairs (after asking 10 times, are you sure you don't want to come into mommy's bed?) where she proceeded to sob because the "lights are on" even though they weren't. she could not be conviced that all the lights were out. she cried with a blanket over her head for 20 minutes. i'm not sure she was even awake. huge fight over clothing before school. i just felt like i was supposed to put my foot down about SOMETHING. ANYTHING. but she would not wear the panties i chose, nor the shirt. i didn't care if she wanted to pick out her own clothes i just didn't want a hassle. i finally told her she could go upstairs and get different clothes but i would NOT carry her up the stairs so she wailed at the bottom of the stairs for 20 minutes. she did finally come up on her own. dropped her at school after having noodles for breakfast and tried to go home and sleep but couldn't. now it's almost 11pm and i'm still at work. sleep deprivation is not good for me. i had no patience. then tonight i saw a mom pushing a stroller with a toddler who clearly has cancer and i feel terrible for having a fight with my kid.