Feel like a bum

I feel like such a bum. I'm so tired every day. I get 8 hours of sleep and my 2 year old daughter is FINALLY sleeping through the night but I am STILL tired. She's very energetic. I get so stressed when she yells at me and asks me over and over and over for the same thing and cries if I can't give it to her. Every day I do chores, dishes, laundry, vacuuming, cleaning up random spills, make her three meals a day, change explosive diapers, bathtime, ect. When we go shopping, in order to get our groceries across the parking lot, down a path, and up three flights of stairs, I use the carrier and strap her to my chest (she's over 30lbs) and carry an additional 75lbs of groceries, milk, juice up the stairs all at once. I do not have a babysitter, or any grandparents nearby so the most I get is a couple hours when my SO watches her while I go out one sunday a month.

All of that being said, my SO is fairly helpful when he is home, even though he's working most of the time. I don't have to go to work, I don't get up early, she does nap and I get a solid 2hr break, there are times she plays nicely and I can relax for 10 minutes. I know so many people have it so much harder, they work harder, get less sleep, and still do ok. Well, I feel like a bum because I'm struggling and am tired everyday. I just feel so guilty and like such a bum because there are so many people out there who have it way harder.