Sleep deprivation is making me lose it

My daughter is 3 weeks old and I don't think I've slept more than 2 hours straight in a week. I keep seeing things that aren't there and I forgot where I parked at the grocery store yesterday for like 15 minutes. Is this normal? When does it get better? My wife is doing the night shift right now and I do days but I still can't sleep because I'm just listening for her to cry. Someone tell me this ends.