Restylane Injections Only Lasted Three Days?

Injected properly, Restylane in the lips won't disappear in 3 days. As others have mentioned, you likely had a fair amount of swelling and had less product injected than you thought. Always be clear about your expectations and discuss them at length with your provider. Knowing and understanding what look you're trying to achieve is vital to a satisfying result. The more educated and informed you are, the better off you'll be!

In general, both Restylane and Juvederm work well to fill the lips. Juvederm is a little softer than the Restylane, and may be a better option for some patients. 
These fillers generally last for about 9 months, but actual results vary from patient to patient.  It is not possible for the filler to last only 3 days.  What you may have seen initially was some minor swelling, and less of the product was injected than you thought.  It is possible the nurse took a very conservative approach.  I would give it a little bit of time and see how your lips look after a few weeks.  At this point, you may elect to use more filler in the area.  Overall, a filler is the best option for a lip augmentation and will give the most natural result. Thanks and good luck!

Without photographs, we can't evaluate your situation but Restylane does not disappear after three days.  You also haven't indicated the volume of product injected.  Given all the board certified dermatologists and plastic surgeons performing this procedure, I frankly do not understand why a patient would see a nurse, rather than a physiican.  I agree wholeheartedly with Dr. Palmer that fat transfer is unpredictable and problematic.