Need some advice please help

Hey guys I need help. My daughter was born a month ago and since a week ago she won’t fall asleep in her crib anymore. She lands up crying and the only way I can get her to sleep is when she’s being held or I lay down beside her in my own bed. I’ve grown tired not being able to sleep through the night and maybe getting an hour nap here and there until my partner gets home from work. I try putting her back in her crib once I know she’s asleep but she immediately wakes back up and begins to cry once again. This wasn’t a problem before last week so what do I do?