At a lost

We have tried everything. Taking Cara babies methods, Ferber method, let him cry. Nothing is working. I’ve researched all sorts of sleep training and nothing is working. My son went from sleep all night starting at 5 weeks until 4.5 months old. Now we’re lucky he sleeps all night once a week. We are exhausted and frustrated. I guess this is our new normal. Prayers are appreciated because I’m about to loose it.