L.C.
Dear T.,
Your story is so familiar to our situation. The first 7 month of my son Oliver's life he never slept through the night, surviving on napping 20-30 mins at the time and also did not get any sleep during the day. Like you, we tried everything you mentioned, but nothing worked.
My main concern was that Oliver's brain development would be impaired by the back of sleep and I spoke to our pediatrician and health care worker who told me that this is simply how some babies are, which is no help when you yourself is sleep deprived and craving just a couple of hours sleep.
I was recommended a book by Dr. Marc Weissbuth, Healthy Sleep Habits, Happy Child and I pass this recommendation on to you.
The books will not provide with you a fail proof solution but will give you suggestions and most importantly allow you to understand what is happening to your child.
The key learning I took is to put sleep resistant babies down for a nap every!! 1.5 - 2 hours and how to recognise the signs of sleepiness, This is hard going for a few weeks but eventually Oliver caught on to the benefits. Also sleep resistant babies should go to bed early around 6 -7 PM. This for some families seems unreasonable as it gives you no freedom to leave the house with your baby in the evening but it's worth it in the long run. The books explains the benefits and why's.
Today at 10 month, Olive still is not a great sleeper during the day but is in his bed sleeping between 6-7 PM and usually stays a sleep until around 6 AM.
I know its tough what you are experiences but it wont last forever, so stay positive.
Kind regards
L.