Sleep help please.

Since like 4.5 months (coming up 7mnth on the 15th) my little ones sleep has slowly got worse to now he's barely sleeping 7hrs a night.

I work nights so I start at 730pm and finish at 715am, 3 nights a week - so I'm literally living on little sleep per week as when I go home I have the little one to deal with as my partner also works. It's really really draining now.

Also he's huffy and whining 24/7

Any tips or help or what can I do to one help him sleep more and two stop him being so huffy?