I'm 18 weeks (going by my scan dates) I've gone by my LMP on my ticker. Tonight I went to the bathroom and wiped small amounts of bright red spots. My heart sank and been going every 2 minutes since and nothing? I was very constipated yesterday and had to strain for 2 hours but that was yesterday I've been fine today. I have no cramping just this small amount of spotting. I'm so worried I suffered losses in the past but all were before 12 weeks. I'm also o negative blood group so wondering would I need an anti D injection. Had a week from hell so far so this just tops it off. Anyone else had this what can it be?