I had unprotected sex on Friday night, June 5th. My period always starts on the 19th of every month. I am pretty sure I was ovulating when I had sex, I have now been spotting for four days, and I was just wondering if I was pregnant or the spotting was caused by something else.

Just because you are spotting doesn't mean that you are pregnant. I would say that spotting would make you not pregnant. But, I do not know. Since you had unprotected sex there is always a possibility that you could be pregnant. The only thing that you can do it take a home pregnancy test to see if you are or go to the doctor. No one on this site will be able to tell you if you are pregnant or not. So, go buy a HPT or go to the doctor. Remember to use your mornings urine if you take a HPT.

The spotting may be from the recent sex. It takes roughly about a week or so for a fertilized egg to implant. Wait until your period would be due and see what happens. Test at that time if need be.