how many days late until BFP or AF???

So I used clear blue ovulation my last period was 25/01 and finished 31/01. I started testing and got my flashing smiley on 07/02 and high on the 09/02 we BD - 05,07, 08, 09 & 10 Feb I should of started AF 23/02 according to glow and I know it's only a guideline but I usually am 32-35 day cycles I'm currently on cycle day 41 and 11 days late for AF but I took a test last on 04/03 and that was BFN I am having pregnancy symptoms but not sure if it's just wishful thinking - how long did it take to get a BFP after late AF???