My wife yells at our 6wk old baby

Our son is 6wks old and my wife gets frustrated with him when he cries uncontrollably she sometimes yells at him and the other day she told me that she can't takes this anymore and hands him off to me.... and it makes me so sad that's his mom and she acts like that and in her mind it's ok as long she's not abusing him but I'm scared if she gonna yell at a 6wk old baby because he doesn't wanna go to sleep then what's next... she's a good mom but when she can't get him to stop crying she changes what can I do any advice will help

I have to be the one to stay up all day and night while she sleeps her life away I have to be the one to remember his medicine and I was the one who gave birth to him I'm on maturity leave she doesn't wanna do her responsibilities she barely wants to work n support the house n we behind on all our bills n now I gotta go back to work early but when she was out I held down the bills so she didn't have to stress all she does is play with him n if I'm bout to change him she say I was just about to do that n gets mad if I don't allow her too I'm so tired you guys I feel like a single parent

She even forgot to strap him in his car seat he started crying in the backseat I thought it was another reason n when I went to get him out the car seat he was laying as if he could've fell out if we had a long drive... u don't make mistakes like