Your status as of October 1st would be H-4 if your request for a COS from F-2 to F-1 is approved before October 1st. It currently takes 2.5 to 6 months for USCIS to adjudicate a request for a change of status. The processing time varies depending upon the Service Center that will process the request. It is possible that the change of status would approved by mid-August but it will be close. You can read more about student status at http://myattorneyusa.com/student-visas.
Answered on Jun 06th, 2016 at 2:26 PM