My period was supposed to come around the 20-24 of December. I took a pregnancy test (in home, urine one--First Response) on the 6th of January, and the test read negative. I haven't had any unprotected sex during the month of December or January, my partner and I use only condoms, so I realize there can be a chance of failure (possibly by hands or getting too close during foreplay?)
Back in August I had to take Plan B twice and my periods were a bit irregular since, but only by 5 days late at the most. I usually expect them around the 20th of each month.
There hasn't been any drastic changes in my life, other than I've been eating and exercising a bit less and my stress levels have been up since the start of January.
What's going on? Could I possibly be pregnant or are there other things that could effect my period?