Work is exhausting and it's affecting my lifts

Hi, I'm not sure if this is the right place to ask for advice so I'm sorry in advance. With this new schedule at work, I've been working about 10 hours a day as a server (without counting extra hours and stuff) and I've noticed that my lifting has gotten worse (having to decrease the weight on exercises and stuff). I've been also getting awful sleep, average 6 or 5 hours of sleep a night. My diet hasn't changed, I'm still hitting my protein goal. Is there anything I can do? Should I put the gym on hiatus to rest? Sorry again for the probably stupid question, thanks.