Usually I have my period around the 16th or 20th of the month. This month I started spotting on the 11th, and have been lightly spotting ever since, it has been over 2 weeks. I have been feeling nauseas but have not actually had to throw up and I have also found my temper to be all over the place and been going to the bathroom frequently and having trouble sleeping. Also last night had a horrible headache. My bf and I were not protected he pulled out. I was wondering if I could be experiencing implantation bleeding and be pregnant? Cause normally my periods are heavy and about 5 - 7 days. Could I be pregnant?