Sleep routine - advice please!

[HappyHeart87]

DD is 4mo corrected. Sleeping beautifully at night times; between 5-8 hour stints without waking. Naps once or twice during the day for between 20m-1.5hours.

But I have no routine with her and would like to get one. She will only ever fall asleep feeding, so I need to breastfeed her to sleep at nights and opportunistically sneak her into a nap when she falls asleep at the breast during the day.

Feel super uncomfortable leaving her to cry as something in me says she's communicating some sort of need.

Advice...?

Have you had a look at the EASY routine? I vaguely follow that - lots of info online. I try and follow its recommendation of baby napping roughly every 90 minutes. Might be worth looking up?

Just realised should explain it stands for Eat Activity Sleep You. And wasn't just saying do 'an easy' routine