How serious was it?

ANZAC DAY!
One of the most sacred days for an Aussie!
I was supposed to read in church normally there is just one reading during the week, I check the Mass Book before hand & go to my seat. For some reason this morning there was a bit of confusion & I did not check the second reading or the Gospel Acclamation.
When I got back to my seat my friend said there are 2 Options for the 1st Reading and 2 Options for the 2nd Reading. Blood started to drain and it was too late for me to go up to the altar & check.