I do feel stupid for feeling this. India is currently on fire and also flooding iirc, by contrast here in 
it's not much hotter than recent years. I am lucky enough that we have a portable AC to run in the bedroom.
It's not the literal heat, our room is an ok temp honestly. But the heat seems to be breaking down my joints and bones, I feel like a decrepit corpse weighted with lead rn. This is the first time I'm feeling this too, didn't happen last year so my body is maybe decaying again.
I think it's heat exhaustion, I am making sure to drink and stuff but I just feel sluggish and sore, I am scarfing ibuprofen to little avail. Weh!
My vibes based science says I think I'd get an extra AC instead of a dehumidifier. The dehumidifier will add extra heat into the living space, making the single AC work harder. The extra AC would cool more and dehumidify.
Idk i think it depends on what's going on here. Is your AC cooling to 70-75ish but it still feels hot af because it's humid? Get a dehumidifier
Is the inside temp too high because your little AC is too weak to cool the space? Get another A/C