Is it possible to be pregnant and not have a positive home pregnancy test after being four days late for your period?

It isn't very likely, but I guess it's possible. You are probably just late for your period though. I was a week late two months in a row and I am normally a very regular person with my periods. It just happens sometimes. It is very possible. I myself can NEVER show up on home pregnancy test. I always go into the doc. and my urine test will be negative yet my blood test would be positive. So, yes, it is very possible. Yes its very possible. With my first child I was pregnant a month and the three test I took after my missed period came out negative it wasnt till I was a month and a half that the test came out postive.