Okay so I am 19dpo and AF is 5 days late. My boobs are crazy sore and continue to get worse instead of better; sore for about a week now. I had canker sores all over my mouth a week ago on Saturday and Sunday(I never get canker sores). I have not had any of my usual period symptoms that I get right before my period. I tested last Thursday, Saturday, and Monday, but all 3 tests were BFN. I am never this late on my period; I was very regular when I went on birth control a year and half ago. I finished a pack 36 days ago and had a period. We did a lot of BD during my fertile window and when I ovulated(based this off of CM). Why have a yet to get a BFP or a visit from AF?