Please don’t judge, I’m trying. Diaper help.

My 3 years old is still not potty trained at night time.

She uses the bathroom all day but wears a diaper to sleep.

She’s over 50lbs and she’s a chunky, tall girl.

We currently use size 7 diapers I got off of amazon but it seems like she grew bigger because now whenever she wakes up she’s always wet and her diaper is always leaked.

That never happened before but for the past week or so it’s been happening, I even make her pee before she sleeps and sometimes in the middle of the night too but she still wakes up wet . I did notice the diapers are getting tighter for her, the size 7. Are there bigger size diapers that I can purchase until she fully learns to use the bathroom during nighttime? Anything will be helpful. I did see some things on amazon but $80+ for a pack of 30-40 diapers is crazy.