3 days in the hospital and still no answers

I'm 33 weeks pregnant and have my almost 3 yr old in the hospital due to a fever of 105. They've kept her in here because they keep taking blood out for labs and find nothing. Also because they can control her fever Because it will go back up within 3 hours. I really just want them to find what's causing this 😭😭😭 I want my baby girl back to normal. And I refuse to leave her side here at the hospital. I can't leave her. Regardless of my discomfort.