Im going to loose it

My 4 month old has slept 40 mins in the past 7 hours, she keeps crying and whining ive done everything i can think of, fesh diaper, changed clothes, gave a teether, fed her, rocked her and even just paced around the house with her but it just distracts her for 10 mins and shes back. I know she wants to sleep.

Anything you guys do that helps them fall asleep (he have sound machine on)

Or even words of encouragement would be awesome bc i am tired and if this continues im gonna cry too.

Update: after this post she fell asleep but not for long, she would sleep for 20 mins (15 of which i was rocking her) and then wake up and it was a circle. After about 3 houra of that we played a little my hubby ce home with snacks bc he knows i haven't had any time to eat and now another two hours later i sit her as she eats, her eyes are closed i hope that this is it.