Both the FindMyIPhone and the Google account track your locations, which are usually turned on. If your husband knows the password to those, he would be able to see your location. There are also a number of apps that could track your movement. Check what apps you have and what has access to location services on your phone. If you are concerned you can backup your device data and do a factory reset, which will remove all the customizations done to your phone including data, apps, and settings.