I been testing for the las 5 days everyday is negative, but AF was supposed to come on dec , am still testing and is negative I had two previous pregnancy first one I got a positive after 6 days of expected period, but I mc at week 7. Second pregnancy test gave me a positive after 3 days of expecting my AF, and they were twins that unfortunately we're born prematurely at week 24 and both passed away.  Am heartbroken every time I get a negative but I never had a positive when am supposed too. Any advice.