My 7 month old has been waking up every 30 mins. I'm in day 5 with no sleep what so ever. I dose off…

My 7 month old has been waking up every 30 mins. I'm in day 5 with no sleep what so ever. I dose off and she awake again and I've been in the hospital also with my older because she had surgery so I was up all the time Cher there with no sleep. I'm running out of ideas to help put the baby to sleep.