So my period was supposed to start on Sunday.

My boyfriend and I had sex on Saturday night and on Sunday night. I figured that would push my period back a day or so, so I didn't stress.

But now we're going on a week with no period. My job has also been increasingly stressful, but that's only been for the last 3 days. This isn't the first time this has happened, but it is the longest time without a period.

Should I be worried about a pregnancy?