Cover Fx concealer to conceal signs of tiredness?

 last night was the worst night of my life as i had a breakup with my boyfriend after a three year relation.after we spoke for the last time,i have cried my eyes out for the last three days and now the result is that my eyes look fatigued and look as if i have dark circles.the problem is that i have a photoshoot next week  and if i go on weeping like this ,my photographer will refuse to take my pictures for my my friend asked me to use Cover Fx concealer. can Cover Fx concealer hide these dark circles and fatigueness and make me look camera friendly?kindly help.