You can quickly view your Sent Emails, Scheduled Emails and Scheduled Campaigns two ways:
From your Dashboard > Reports > Emails > Email History Report.
Within your Sent Emails tab you are able to filter by Time Period and User:
Click the Scheduled Emails tab to see what emails are sending next, or to cancel or reschedule an upcoming send:
Click the Scheduled Campaigns tab to see what campaigns are running, or to cancel or reschedule a campaign: