Tratando todavia de resolver bug en Confirm. Ahora mismo funciona. Por alguna razon, a veces el arreglo appointments llega vacio al listener de respuesta a la notificacion, en cuyo caso no pasa nada a Confirm y se rompe en confirm porque no tiene ningun valor para usar en el query.

screens/main/Confirm.js

       navigation.navigate('Search');
     });
 
-    console.log("en confirm", route.params.tag._id);
+    console.log("en confirm", route.params.tag.citaID);
     //const cita = firebase.firestore().collection('APPOINTMENTS').where("new", "==", "true").onSnapshot(snapShot => {
     const cita = firebase.firestore().collection('APPOINTMENTS').where("citaID", "==", route.params.tag.citaID).onSnapshot(snapShot => {
       const appointments = snapShot.docs.map(docSnap => {
           }}
           >
           <List.Item
+            title='Usuario:'
+            description={item.User}
+            titleNumberOfLines={1}
+            titleStyle={styles.listTitle}
+            descriptionStyle={styles.listDescription}
+            descriptionNumberOfLines={1}
+          />
+          <List.Item
             title='Mes:'
             description={item.Month}
             titleNumberOfLines={1}

screens/main/Home_page.js

 });
 
 
-const double = [];
+let x = "x";
+console.log(x);
+
 
 export function Home_page({navigation}) {
 
     });
 
     responseListener.current = Notifications.addNotificationResponseReceivedListener(response => {
-      //console.log("response", response);
       if (response.notification.request.content.body == 'Le solicitan una cita'){
-        console.log("en pedir response", {appointments});
-        console.log("el id", appointments[0]._id);
+        console.log("response appointments ", appointments[0])
         navigation.navigate('Confirm',{tag: appointments[0]})
       } 
     });
           renderItem = {({item}) => (
           <TouchableOpacity
           onPress={async () => {
-            console.log("item._id, home, interpreter", item)
+            //console.log("item._id, home, interpreter", item)
             navigation.navigate('Cita',{tag: item, Pin: item})
           }}
           >
               onPress={ async () => {
                 await sendPushNotification(item.i_token);
                 citaId(item._id);
-                //double = appointments.map((number) => number);
-                //console.log("double", double);
+                x = item._id;
+                console.log(x);
+                console.log("en pedir cita, appointments", appointments[0])
                 }
               }
             /> 
       return;
     }
     token = (await Notifications.getExpoPushTokenAsync()).data;
-    console.log('Token:', token)
+    //console.log('Token:', token)
   } else {
     alert('Must use physical device for Push Notifications');
   }