I got two strange emails, please read for more?

At 4:27 and 4:30 am today, I recieved two weird emails supposedly from myself. The e-mail address mirrors my own address: My email is in the format of firstnamelastname@yahoo.com, while the other is lastname.firstname@yahoo.com. Each e-mail had dubious-looking attachments, one of which reads, "AUTUMN FROM BEHIND WHILE SHE TASTE TARA.jpg. It is really creepy. What does this mean and how should I handle this?