4 month sleep regression?

Any advice or tips on how to get my 4.5 month old to sleep through the night again?! He was sleeping from 9ish until 4/5 am then back to sleep until 7 or 8!Now he is up every hour and half/ two hours...I put him back in the swaddle to see if that would help but no luck. Also, I’m an exclusive pumper, couldn’t nurse due to latching issues, so I have to feed him, get him back to sleep, then pump. I’m getting little to no sleep. This has me super discouraged. I’m ready to give up BFing and just get some formula, it’s starting to feel too hard. I have worked so hard to keep up my supply tho, I don’t know what to do! I feel like I’m going crazy! Mommy is tired. Mommy needs some actual sleep. Send good luck, some helpful advice, and coffee ☕️ #imexhausted #thinkingaboutcoffeeat5am #fourmonthsleepregression #needsleep #ifidontgetsleepsoonimgonnayankmyhairout #thoughtwewerepassedthenewbornstage #sendhelp