I'm 16 weeks and 5 days pregnant and just today I noticed a small amount of light red blood when I wiped.. All through my pregnancy I've had on and off spotting starting when I was around 5 weeks but all ultrasounds come out just fine. I've also been on pelvic rest since 8 weeks along so it can't be caused by sex.. Anyone know what it could be from? Or have simular experiences? I'm also going to call my doctor tomorrow as well.