When you feel trapped with no way out, you might say you're "in a corner." But there are many other ways to express this feeling of being stuck or cornered. You might say you're "penned in," "boxed in," "hemmed in," "trapped," "caught," or "cornered." Similarly, in certain contexts, you could use phrases like "at a standstill," "deadlocked," "stuck in a rut," "up against a wall," "at a loss," "in a bind," or "between a rock and a hard place" to convey this same sense of confinement or stasis. Each of these alternatives carries its own slightly different connotations, so it's worth exploring them further to find the one that best fits your situation.