If location services were on you can use the Play Store site to locate your phone but there are a lot of security apps available that will do the same thing. Using Google's WEB site should be enough but if the GPS was off you may have a problem.
ADM is a great tool...I have used it on all my phones for about 2 years now. Just FYI: if you didn't already do so, you might want to open your phone Settings > Security (might be Security & Screen lock) > Device Administrators and make sure that ADM is checked. When that is checked it will give you the added feature of being able to remotely wipe your phone from any browser...if that's something you want to have available.