Hello, I am a 20 year old female and I have been worried about possibly being pregnant. My cycles have been usually normal but I had recently started working at a stressful job (Very first job) in late July, because of that I had two periods in August but only one in September. It didn't seem odd to me at the time but now in the month of October my period is currently two days (going on three) late but I figured that its because I've been stressing about school and dealing with very rude customers at work. I also had sex (Protected) 4 days before my period  was supposed to happen so I'm thinking its delayed. I am considering getting a pregnancy test at the end of the month (just in case my period magically happens and I'm not just being paranoid). All the times I had sex with my partner it is always protected and after we were done we check to make sure there were no tears or breaks in the condom. My question is that is this normal to miss a period one month because of stress and other personal problems or could this be something more.