Refusing naps...tips?

Morning all,

My little one (16 months) is refusing naps all of sudden. She will go up for nap time and read to. She will yawn, rub her eyes, and scratch her head(all signs that she is tired). I will read 5-6 books and I read goodnight moon last as always. as soon as I put her in her crib she wails! I leave giving the same line I have for the past year and listen to her for 15 mins before she settles. My baby has never refused sleep. I think she is battling separation anxiety(which she hasn’t before) and cutting teeth (eye teeth are coming down). She used to sleep 2 to 2.5 hours, now I’m lucky if it is one. Any tips? TIA!