Going through US immigration as the spouse of a US citizen

Hi everyone,

I'm marrying my American fiance this march in Argentina, my home country. We are planning to go right after that to visit my wife's parents in the US and have a short honeymoon there (I'll be around 3-4 weeks in the US). After that, our plans is to remain long distance for some time and then probably come live to Argentina, but if we do go live to the US, we are going to do the proper process to get my green card through consular processing.

I would be entering on my B2 Visa, and I have entered several times in my life with this visa, and 4 times during the last 2 years, and never came close to overstay (always 3-4 week trips).

I have a return flight, I have a job that I don't plan to quit, I have my family here and my fiance is also a Argentina Citizen. I live with parents so I don't pay rent.

I have two questions:
1- I know this might raise some red flags to immigrations officers, but is it likely they won't let me enter the US? I mean, of course nobody can know with certainty, but am I overthinking it?
2- Should we go together through the US Citizen immigrations line at the airport? Or should we go separately?