Ay, I feel you mama! Two years is quite a journey na, congratulations sa pagiging patient mo. The best approach is to do it gradually, replace one feeding at a time with formula, maybe every few days, so both you and baby's body can adjust slowly kaya hindi sobrang shock. A few of us moms did this, and honestly, parang three to four weeks ang usual transition period depende sa baby; some of my mum friends started with the midday feed first kasi less emotional attachment doon, tapos eventually do bedtime. Since it's a significant change for your little one, mas okay na i-check with your pedia kung ano ang recommended timeline at formula na best for your baby's age, lalo na kung may health considerations! Good luck, mama, you've got this!