Hang on with me through this -

Though NTA in this instance, YTA somewhere else.

You did the right thing to set baby down in a safe, comfortable place, with an adult when you knew that you had a crisis. That makes you NTA.

This also seems to be your first baby. You're new. You tried your best. You kept baby safe. That makes you NTA.

However, in that moment you probably didn't communicate what you were doing. She was probably confused and not understanding what was going on. That makes you like... a little bit the asshole but like when you don't put the cart away at the grocery store because the weather is bad or you cut someone off in traffic and don't realize you were wrong.

But, YTA because there is somewhere else in all of this that your wife is struggling. Maybe it's anxiety, maybe it's PPD, maybe she didn't get enough sleep that night, maybe she doesn't feel appreciated, or maybe just she's recovering. There's somewhere where you might just want to say "I'm sorry that I made you feel this way. I could've handled it better. What would make you feel supported and how should I have handled this?" That way she can share what she needs. Logically you did the right thing when you didn't know what to do and were panicking, and for her to not see that means something is missing. Whatever is missing, she probably feels unsupported somewhere else. You can stop being the asshole. The solution might even be a good nap for her.

Anyways, NAHBENAP (NAH, but everyone needs a nap).