I have a baby of 5 weeks old, and I am deeply [...]

I have a baby of 5 weeks old, and I am deeply concerned about him. Two days ago, while I was holding my baby as he was crying and i was trying to sooth him, I had an argument with my partner. I have raised my voice, and i have made some soft movement with the other arms. The baby suddenly stopped crying for a few seconds and he cried again. I succeeded to calm him down after that and he felt in sleep.

I do not think that i shook him but what i am sure is that i raised my voice when he was in my arms. He did not show any signs of shaken baby. I took him to the pediatrician a day after and she told me that the baby is fine.
The only thing that intrigued me is that before this incident, the baby was really fussy. He was awake most of the time, and he crying, and he likes to eat all the time. Now, he became suddenly calm and he crying only when he is hungry. He also felt in sleep just after feeding him, and his sleeping patterns changed significantly as he is sleeping on average two hours after he feeds when he was sleeping a maximum of one hour before.
He is feeding regularly but not as he used to be, and he can stay in his crib awake without crying, and he seems to be really happy.

He also started to smile, and he seems that he is really enjoying his life.

However, I am concerned and i am scared that this is not a natural change in his development leaps. I am thinking about this continuously, and I blame myself for being so irresponsible in that moment.

I love my baby and I did not want him to suffer, so please if anyone experienced the same thing, i would really appreciate any feedback