Is there any possible way to locate my iphone without the find my iphone app

Sorry there isn't another way to locate it electronically (other than calling it). See the following from If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

Find My [device] is the only way that you can track or locate a lost or missing device. If Find My [device] isn't enabled on your device before it goes missing, there's no other Apple service that can find, track, or flag your device for you.