HI, I m a 22 yo. I was supposed to get my period 15 days ago, but it didn t come. 8 days ago I bled for few hours, it was very dark blood and in small amounts, and that was it. I have cramps, but I was diagnosed with irritable bowel syndrome year ago. I have had nausea and I ve been throwing up last couple of days, but that can be due to my gastritis and GERD. I am very bloated, tired and moody. Besides that, I have no other symptoms but headache. Is there a possibility of pregnancy?