The last 2 month's my cycles changed and I've gone to 35 and 37 days, all tests from 28 days have been negative and then I've come on.

This month I'm a 38 days now, no sign of a period, little tummy glitters where I expect to come on, get no sign of a period but all tests again are negative! Any one else been like this and just got a positive once being 2 weeks past 28 days?