4 days late for AF

Shan
Thanks for people's input so far. This is all so new to me. This is my 1st cycle ttc and for some reason I now think I may have had delayed ovulation. I've never had it before but seems likely this could explain it.
If I have been delayed then I'm not late but would surely be due in next few days.
I can't see anything at all on the test.
Anyone have any ither ideas? I've driven nyself crazy with all the testing which may have been unecessary.thank you for all the help so far and best of baby luck to you all!