Apple Mail and Chrome open at startup

I have OS 10.9.3. The past few days when I start up my computer in the morning, Apple Mail and my Chrome browser open by themselves. I do not have any startup items in my account except for Dropbox. I do not leave any apps open at shutdown. I have quit those apps before I shut down at night. I've looked through some of the support discussions and none of the solutions apply since these apps are not in my startup items and I don't leave them open at shutdown. I can't find a reason for this. Any suggestions would be appreciated.