I just stretched your image to buggery......you do have blobs. They're dust bunnies. Means you're going to have to clean your camera and also take better flats to compensate for any that might be left. You've also got a lot more detail there in your piccie. Just by raising the black point a bit and lowering the midtones in your levels, the neb starts to pop out. And so do the dust bunnies. I've attached a copy of your image I had a play around with, to show you.
Easy fix
