Is a flap of loose skin over a bone graft normal? Will it still heal correctly for my implant?

I had a tooth extraction 6 days ago with a bone graft and permanent type membrane on my lower right molar second from the back. I went in for a follow up yesterday and my dentist says everything looks normal, but since then after a rinse, a flap of skin came loose from my stitches and its just floating around in there still attached, but barely. Is this okay? Will it affect my healing over the membrane? Im just nervous I messed it up and I don't want to have to risk not being able to get my implant.