Hi has anyone had experience of getting a negative with clear blue early detect digital test and then going on to get a positive later? I have a regular (like clockwork) 29 day cycle. I took a test last night 3 days late and it was negative. I read today I should test in the morning next time. I know these tests are supposed to be 99 percent accurate so just interested to know if anyone has had a positive after an initial negative with these tests?