not one's day, this is
Also, just one of those days. Nothing is going right for one today. For example, The car wouldn't start, it rained unexpectedly—this is not my day, or The phone has rung nonstop all morning; it's just one of those days. [c. 1920]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.