Sleep after immunisations

Poor baby spiked a fever up to 38.9c, it’s finally down to 38 now but he’s been so upset and now it’s 4 am and he refuses to let me put him down.

I’m getting really tired and my partners out of town so no help.. I’m scared I’ll fall asleep with him on me so I’m laying on the floor and trying to keep myself awake.

Anyone have any tips or tricks 😭