I think with your history its probably just that your body doesnt process hcg like most preggos. The left side pain is concerning because you do hear about ectopics having pos then neg tests. But then again, usually you will have pretty severe consistent cramps. I know not all women get severe cramping but a lot of stories I have read and heard are that it was consistent and bad. My good friend had an ectopic and said she was in so much pain until her tube burst...then she felt a little better. Go with your gut feeling but I am betting this is like your dd...rather than ectopic.