I think I'm having a chemical pregnancy and I'm just wondering how long it took for people to get their periods after their tests started to go back to negative? I had a faint line Sunday on a few different tests, a fainter line yesterday and negative today. I also had cramping yesterday that I thought were due to pregnancy as it felt like a pulling feeling rather than period cramps. I had similar pains when I was pregnant in January that unfortunately ended in mc. I'm just wondering how long it usually takes for your period to come?