I had Restylane Classic injected under both eyes about five months ago. I have been sleeping on my back the last month or so because every time I sleep on my right side (which I prefer) I get a dent under my right eye. It takes pretty much an entire day for it to go back to normal. Is this a sign that it is wearing off and I need to have the fillers injected again? Is it because of the type of filler? Thank you!