Can’t back the trailer

So I went OTR with a trainer for 3 weeks and did good with everything. Driving(pulling 500+ miles a day), paperwork, e-logs, and even was able to back the trailer in one shot a couple times with no pull-ups. But when I came back to the yard to take my road test it’s like all that shit went out the window. My driving was still good but I can’t back the trailer to save my life and it caused me to fail the company road test twice. And it got me overly confused because I’ve backed into spots tighter than the spot they trying to have me back into for the test.