I have a breakthrough bleeding. I have been on a birth control pill for four years. I had sex about a week ago. I just moved to London, so I had to change the time I took the pill. Also, I have been stressed lately due to the relocation. After having sex, I bled (which is a normal occurrence for me), but I continued to have light spotting the next couple of days. It stopped for a few days, and it started again today. It seems like I am on my period. I am not supposed to get my period till next week, and I usually get my period on time. Is this normal? Should I be concerned or get a pregnancy test?