Lost my iPhone. Find my app turned off. Any way to locate it?

This support article has a list of things to do if your iPhone, iPad, or iPod touch is lost or stolen. --> If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

- The Find My service described in the article is the only recovery feature Apple offers. It must be set up before the device is lost.

Read this support article to learn what you can do if Find My iPhone or Find My iPad isn't enabled on your missing device --> If Find My iPhone or Find My iPad isn't enabled on your missing device - Apple Support

As for finding it now, you will have to use conventional means for locating lost items. Ask around, look under furniture, etc.