Hello and thank you for your question! Unfortunately, dermal filler in the lips generally last the least amount of time than dermal filler in other areas of the face. This is simply because the lips move more than most areas on the face (talking, chewing food, etc),...
Princess Volume with Lidocaine is the best option for lips. This product has recently replaced Princess Volume (without Lidocaine), but both are satisfactory. The product without Lidocaine requires you to add it yourself. In my experience Princess filler provides nice, natural looking results.
Don't feel stupid! Yes, your lips should go back to what they looked like after HA fillers were used. There are some fillers like silicone injections which I do not recommend that have to surgically removed if the results are undesirable. In contrast, there are longer lasting was to improve ones...
