Spotting

Lay
Need some advice ladies... I'm 19+2 I've been to the E.R twice for period like bleeding for a few days when I was 12 weeks and again at 14 weeks 
They couldn't find out what was wrong and E.R doctor told it may be the fetus trying to abort itself didn't get much answer and her Iam today spotting.. Has anyone experience this any insight would be greatly appreciated