Lash extensions

I got lash extensions last night it’s been only 14 hours and already a bunch of have fallen off. She said this set would last at least a week if not more. I haven’t gotten them wet or had any oil on them or anything. Slept on my back. I’m pissed they’re already coming off and it hasn’t even been a day. Is this normal??

Right when I first got them (ignore my brows lol)

And this morning....

Not a huge difference but you can tell the edges are less full I’ve found like 5 lashes on my cheek and it hasn’t even been a day. I got a special on Groupon $25 for 30 lashes each eye so maybe that’s why they’re coming off because I got the cheap one??