My son has been a terrible sleeper since day 1 but I was not ready for the 4 month sleep regression. I used to nurse him to sleep and do contact naps during the day and during the night I would have to replace his pacifier every 20-30 minutes and nurse him every 1.5-2 hours. I wasn't getting any sleep, I was anxious and frustrated.
My son now sleeps for 11-12 h a night and is taking good naps during the day. Most importantly he learned how to self soothe and fall asleep independently.
Selina was amazing during this process, she is empathetic, responsive, and she patiently helped us with every challenge that arose because my son did not make it easy for her.