Restylane Disappears in 2.5 Weeks?

Restylane lasts longer than 2 weeks, even to the lip area. If you haven't followed up with your provider to determine what is happening, that's the first step. Before and after photo's might help with the assessment too.

Out of curiosity, did your physician take before and after photos? Without these images it is impossible to know were you started and where you are after 3 ml.  I assure you that it is not possible to be injected with 3 ml of Restylane in the mouth and have it all "disappear" in a couple of weeks.  Without photographs, it is your memory against that of your physician.  Please consider posting your photograph.  That would provide a great deal of information.

It is highly unlikely that the Restylane disappeared after 2 weeks. The 'result' that you noticed after treatment was probably due to post-injection swelling, which resolved after 2 weeks. You probably need more filler for the result that you desire. I see that you only had 1 cc injected each time -- in my experience, this is sufficient for some patients, but many others need more for an improved correction. One syringe is usually a very subtle change. 

It is highly unlikley that the restylane dissappeared in two - three weeks.  It usually lasts  about 6 months. I would compare pre and post treatment photos.

It is highly unlikely to have complete loss of improvement in a matter of weeks. For the lips, you would want to keep with a hyaluronic acid - either juvederm or restylane. Some patients react better to one over the other. For the smile lines a small amount of radiesse or juvederm may help.