period ending

I have mistakenly closed the PO period prematurely (close Oct on Oct 9th!).

I try to "reopen" the period by changing the setup options and bringing the month back.

I am hoping that everything can be processed smoothly for the rest of Oct. I assume that other modules are not affected (I have not closed any other modules for Sep yet.)  

If it works, do I re-close the period (October) again in early November?

Any suggestion will be appreciated!