5 days late and negative pregnancy test

Hello ladies, need help/advice/positive stories- My AF is always on time, at max a day or two here and there. Never have I ever been this late or skipped a month in my life. I have taken 3 home easy pregnancy tests and all have been negative. I just ordered frer and will take time to get delivered. Any possibility that I may be pregnant ? I have been having mild cramps here and there.And not showing on the tests ? Waiting to get an appointment with obgyn as well. What do you all think ??