As for your team being short on numbers, not your problem and for not having a choice - bollocks.
Will whoever is running the team sort it out for you if you screw up OASC - eerr no.
Will OASC cut you some slack post march, because your tired - eerr no and no.
What is the next 10 - 20 years of your life in a well paid (and well worth it ) job compared to the march, worth ?
Methinks you need some advice from parents / other ATC staff and look at the BIG PICTURE.
Best of luck though
C130JB