Late Period Confusion

Hi everyone - a bit new to actually writing something here, but hoping to get some other opinions for those who know a bit more :) I went off birth control 2 months ago, and my first period was regular (a day early actually) but this month is now 5 days late, with absolutely no sign of my period anywhere - no cramps at all. i am super emotional and a bit bloated, but nowhere near my regular PMS. i took 2 home pregnancy tests (just to be sure) and they came up negative. I am not overly stressed and haven't changed any of my lifestyle habits drastically, so I wondering if there may be some other reasons I don't know or didn't think of? Should I wait and test again later? Any help would be appreciated :)