I am a week late and am always right on time with my period. It has NEVER been this late before other than when I was pregnant. I have taken 4 pregnancy tests and they're all negative (all the same brand btw). My doctor told me that my hormone levels are not high, I have had a few miscarriages and she explained that my hormone levels are not high enough to keep a pregnancy. Anyone have a similar experience and still end up being pregnant?