Praying for you and the little ones Rosa!!
Skeet we didn't give Laila a solid till 5 1/2 months and it was mostly played with rather than consumed. They have done a bunch of studies and really have pushed holding off food till they are 6 months or older. We clearly didn't follow that. The sleep/hunger issue at that age was something we went through too. I just assumed it was a growth spurt and dealt with nursing her more. If you want to hold off on food a little longer you could try dream feeding him or trying to get him to eat twice before bed.
I will share this with you. My daughter has gone from sleeping through the night, to waking up once, to waking up 5 times, back to sleeping through the night, back to once a night, back to sleeping through, back to every single hour, back to sleeping through. They just follow a growth and development pattern and we have just had to wait it out. She actually slept worse at 9 months than she ever did the months before that. I got more sleep when she was a newborn! lol Shes coming out of it now though. So if you ever feel hopeless know your not alone. I had a couple hopeless nights recently (hence why I was away so long).