my gfs period, which usually comes inbetween the 10-14, has not come yet and today is the 17th. We have been having protected sex except for a time were it was unprotected for only about 20 seconds at the beginning and ejaculation did not occur. All within the same month she has gone traveling to multiple different states and had a change in schedule. I know these things delay the period but I'm a very worrisome man and its driving me crazy. She says shes been having her usual period cramps but theyve been short and havent lasted all throughout the day like they usually do. Can someone help me out tell me if I'm over reacting or and appropriately concerned? Thanks.

Adam