Falling asleep while nursing

My bubba is 15 weeks and lately, she keeps falling asleep while nursing...which is fine, but if I unlatch her, she wakes up.

😭😭😭

Is this just a phase or is this her new thing? Could it be the leap? Teething???

I’m so frustrated, because I want her to nap but not like this—with my boob in her mouth the whole time!!!