Pediatrician totally Freaked us out!!! 😧😵 4 month sleep regression......

First time parents over here with not a lot of baby experience and got blindsided by our pediatrician. Had the 3 month check up today for our early March baby and she totally scared us for the upcoming 4 month sleep regression!! We are totally freaked out about what’s on the horizon!! She said in the next 2-5weeks our good sleeper will start waking up every 1 or 2 hours!!!!! 😞😧

She suggested we stop feeding him to sleep/sleepiness during bedtime and that we try to get him to self soothe in the next few weeks ahead of the regression.

Any tips for preparing ourselves and baby for the storm ahead?

Any Self-soothing teaching recommendations?

We would love some tips/ideas!!!!

Currently stats:

-12+ weeks

-16lbs

-Averages 1 wake up a night (sometimes 0, sometimes 2, rarely 3)

- sleeping in crib in his nursery with a video monitor, humidifier and white noise machine.

- we do bedtime, with feeding/burping last and he usually passes out mid burp session and then we transfer him to crib.

He has been a bit ahead in his milestones/leaps so we are worried he may hit the regression a little early....

Thanks in advance!