Oh, Hon, it does get better. It really does. The first 6 weeks can be brutal. It is a huge adjustment, and that is understated. You are probably experiencing very natural baby blues, but if you feel depressed all the time, you need to see your doctor. After birth, our hormones are all out of whack, and sometimes we need help getting back to feeling normal.
Is your husband (dh) around that he could help out? Would he get baby in the night and bring to you to feed and then get her back to sleep so you can sleep? Are you going to bed when she does at night? (I don't nap well either, so my solution was going to bed at 8pm.)
You are nearing the 3 week growth spurt when she will likely eat and eat to up your supply. Try to stay in, just lounge and feed her. Try to at least rest if she sleeps. If anyone can offer you an hour of watching her so you can take a bath or rest, take them up on it. Ask your mom to bring dinner over, if she lives close, or a friend if they are willing. Teach yourself to let go of control - over the house being clean, over whatever bugs you. Hug yourself and tell yourself that it gets better. Motherhood is a journey.
My babies both loved being "worn" for activity period in a sling type carrier for the first months. It was womb-like, and the movement lulled them. When they were starting to fall asleep, I would try laying them down. Do you have any type of carrier that you could use?