Kind of an adhoc post....
You are hot. Even in this extreme heat, do not overbuy as the unit will freeze and will not dehumidify.
For your bedroom(it is cooler at night anyway)
up to 175 sqaure feet 5,000 BTU
175-225 square feet 6,000 BTU
225-275 square feet 7,000 BTU
275-325 square feet 8,000 BTU
375-425 square feet 9,000 BTU
Add 1-2,000 BTU if on a sunny exposure or third floor
Buy a decent name if you can, you dont want to lug this back to a store
At this writing, there are no reported shortages either at Yale or our competitors