If date range of your user timesheet matches a "timesheet period" and you are required to submit your timesheet, you can view approval status of your timesheet on the top right. It can be one of the following statuses:
Open: Your timesheet is not send to approval yet. You can continue to work.
Submitted: Your timesheet is send to approval but your work is not approved for any of the projects yet. You can continue to work.
Partially Approved: Your timesheet is approved for some of the projects you have submitted. You can continue to work on un-approved projects.
When you click on the status, WorklogPRO will display project by project information of how much you have worked, approver of each project along with any approval information if any. You can write a short explanation and submit your timesheet.
When you submit your timesheet, overall status of your timesheet will be "Submitted" but you can continue to work on projects until a project is approved. You can always continue to work on un-approved projects.