My poor lil doggo isn’t feeling well. Lethargic all day yesterday, which I had thought was because of the heavy rain and us not getting much sleep.

Is your dog drinking at least? Pooping?
My dog hasn't eaten much in two days. There is a dog in heat in the neighbourhood someplace and he is too horny to eat. He howls at the window and whines all day long. On walks he makes a beeline for the park and has to sniff every blade of grass, but has no idea where the dog is.
It's been a bad few months for this. Lots of people choose not to fix their animals, probably because it costs too dang much.
We didn't think it was necessary to fix our guy, we just make due with these bouts of silliness.
I hope your doggo is OK.