We are going through the exact same thing, although my daughter is 16.5 months. We went from never encountering a leak, to being absolutely soaked, and waking up much earlier than expected! Sheets are soaked, along with her blanket and lovey that she sleeps with. It’s become a laundry nightmare, and I feel terrible for her that she’s ultimately sleeping in wet clothing and bedding. I think I am going to attempt going up a size in diapers first, followed by the liners if need be, and lastly doubling up on diapers.
Thanks for all the tips and tricks, glad to hear we’re not alone in this, and have fellow moms to lean on! : )