Help. Suggestions. Please.

My newborn boy is 12 days old. Due to my mother in law not leaving us alone about it, we've switched his formula 3x. We went from gerber goodstart gentle, to gerber goodstart soothe to similac pro sensitive. All of which seem to give him gas.

He gets fussy all throughout the day. The last 4 days hes been getting constipated, more gassy and wont sleep more than a few mins before he wants held...

I feel so bad I don't know what to do. I also am so terrified of having a colicky baby.

He arches his back and squirms a lot becorw fussing. I helped him get some toots out earlier. Then he grunts while struggling to poop a giant diarrhea poo.

I am seeing the pediatrician tomorrow.

Am I switching his formula too much?