No.

The IRS understands that many circumstances (including those like you described) require extensions legitimate extensions.  All things being equal (the quality of your return & documentation), you are no more likely to be audited with an extension than they are without an extension.  In fact, given your frazzled state, you’re much more likely to a mistake – and trigger an audit – by trying to meet the April 15 deadline.  Do yourself a favor; file for an extension.  The quality of your returns will be much better if you give yourself a little time to prepare.  You can request a new filing date as late as August 15 WITHOUT giving a reason at all.  You can further delay until October 15 with any reason at all and yours are excellent reasons for needing an extension.  One key thing to remember – the extensions give you more time to FILE; they do not give you more time to PAY.  You should estimate what your tax liability will be (if any) and mail a check for that amount with your returns.  You can download the requests from www.irs.gov . Go ahead; give yourself the time you need.  And you can do so WITHOUT increasing the chances of your being audited.