4 month sleep regression

Nan
Is this a real thing?? Is anyone else going through this right now? My baby is breast fed/ bottle fed breast milk during the day at daycare. She had been sleeping 8-10 hour stretches, with very predictable sleep and wake patterns, through the night until about 2 weeks ago. Lately, her sleep and wake times are all off and she's waking, wanting to nurse every 3-4 hours... I work full time, and so does hubby... He sleeps right through it all but I'm struggling. Please tell me it gets better!