18 dpo and af is a no show?

I am in the same boat as you. I am 6 days late but I have taken 3 test and they have all be BFN. I am going to test again tomorrow. Like you I am having all the same symptoms. I would think that you are, if you had no history of being late. Best of luck to you. I am hoping that by answering your question my AF will arrive cause she always does when I put something on here about possibly being pregnant. LOL