I'd get her checked out. The temp is on the high side and her behaviour is a worry if she's lethargic.
It's sad, i mentioned this to our Dr about Dd's temps and was told she looked fine now and to just keep up her fluids and a temp under 40 was fine aslong as we can bring it back down

HotI hun i hope she's feeling better ASAP, if you need me at all let me know... not that i can visit but i can drop things off if needed.