I hired a paid tax preparer but not sure if she will file in time, what will happen if we both file the same return?

I was advised to hire a tax professional and I did but not I am not sure if she will be able to file before 15th Oct deadline - as she is not at all in touch since last 2 days. 

Now if I file the return myself and she also file at her end (both efile) what will happen?

will it trigger any audit or something ..(they both will be identical returns, no change a at all accept that she uses UTAX software and  I will use turbotax.

How soon after filing we get a confirmation from IRS that they received it ?