Shitty mom?

If this makes me a shit mom please tell me. Is it wrong to leave my 6 week old daughter with her dad overnight so i can have a night out? (We arent together so she would be at his house) My mom called me a shit mom for wanting to go out friday night. I will be drinking so im not driving home. Im not leaving her with a stranger, im leaving her with her father. For the past 6 weeks i have done nothing but sit at home with her and all i want is one night out.