My girlfriend is about a week late with her period. We've had sex several times (always protected). She has been under a lot of stress for the last few months and now that she missed her period she's getting histerical. I feel like she missed her period because of the large amount of stress since the condoms didn't break (I check them when I take them off) and we are careful afterward to clean up everything, including ourselves. She's been telling me all of her symptoms that might suggest pregnancy. However, I found that all of them are also related to anxiety disorders. Please help me and my peace of mind.