Here's a tip that I was given by my baby nurse.....
To help your bub get the idea of day and night
1: dress your baby in day and night clothes...... Make the night clothes simmilar every day.....Ie only streach suits for bed, never on in the day....
2: have a bed time routine, bath, breast and bed,
3: never put your baby in a darkend room to sleep of a day, let them sleep in day light, that way their day sleeps are shorter and darkness starts to be a que for longer sleeps at night
4: on the same hand keep night time lighting to a mimimum.
5: try putting your baby ( depending on age) to bed a little later, if you give a feed at 7 your bub will get hungry again in the small hours of the morning, but if you feed ( top up ) at 10 pm he should get through till atleast 5 am.
6: if bub wakes during the night try to settle without the breast, some times they wake for "comfort feeds" and this is a very easy habbit to form but hard to break
7: if bub is over 4 months start controlled crying...... To try to teach self settaling.......
Let bub cry for 5 minutes b4 you go to him, then only go in to re position and calm, walk out, remember to keep lighting to a miminum, repete untill bub is asleep.....
I dont know if any of that will help...... But thats what I done and it worked with my girls..... Good luck