Probiotic makes baby worse before better?

Hey guys! I just got some Gerber Soothe probiotic drops for my 5 week old. He has pretty bad gas at night and his doc said to try it. I gave it to him last night around 6pm and he was fussy late into the evening. He usually goes to bed around 8/9pm but he fussed til about midnight..

But then slept ok. I gave him gas drops too after our 3am feeding and he slept til 7am.

Today I gave the probiotic at about 11am and he’s been fussy all day, wouldn’t nap for more then 45 mins at a time (usually naps 1-2.5 hours) and just over all cranky. He’s not inconsolable but still. Also he’s been wanting to eat none stop today and has passed some serious gas! He also pooped a few extra times.

I read online that sometimes their body has to get used to the probiotics and it may make them worse before they do the miracle work they’re supposed to do.

Have you guys had any experience with this? If they made the baby worse did it get better eventually?? Thanks.