Dilemma !

Katarina
Ok so finally have a scan date on the 1st April ... But .... I have a 3day cours and which ends in an exam ... On the same day ! 
The dilemma is I called and requested a new date BUT as its a combined scan they said the only other appointment was the 8th april! And that's too late for the nucle test ...
Coworkers have said either do it or don't they never had the test and Everything was fine ... But I just don't know what to do ...
I think I'm going to have to keep the day and ask my employer to rearrange the course :( 
What do you think ?