Ok, so it's been 8 months since I've had an abortion. My period has been kind of irregular since. I bled for about 3 weeks and then everything went back to normal, BUT even though I had a period every month it was only 3-4 days long. My last period which was in July was 2 weeks long. Now in August I didn't start when I expected. I've been have protected sex but not on birth control. So am I pregnant? Or could it be from stress or from past abortion? Anything that will help please.