An entire room lost power
Chances are one of your breakers is in fact tripped, but the handle does not appear to be tripped.  Try turning them all off, then back on one by one.  Knowing which breaker really goes where is handy -- a breaker finder tool may be available at a local tool lending library.

If it's really the wire between outlets, then look in the "live" room.  One of those outlets will have a feed wire, another will have the daisy chain wire to your "dead" room.  Perhaps that backstab has failed.

A voltmeter is a good investment.