Has anyone else experienced the same thing?

I have an average cycle of 31 days but AF has been know to show a few days before or after the predicted time. My longest cycle has been 36 days, well this cycle has been 40 days. (41 today) Which means I would be 8 days late. I think I might of ovulated later than normal explaining the long cycle, except that I had unprotected sex often for the past 2/3 weeks with my boyfriend. My symptoms have been all over the place but thats quite normal for me, and I have taken a few hpt all coming back negative, except the last one was an Evap taken on cd 39. I feel because I was so late I had to be pregnant, almost even convinced I was and just waiting too see a bfb. Except last night around 11 pm I had some light spotting. By mornig there was more much but definitely not as much as I normally get when AF comes. (The first day is always the worst, I usually have a heavy flow the first and second day accompanied by mild/intense consistent cramps) it's now 5 pm the next day and still lightly although consistently bleeding. But almost no to mild cramps. Not sure what to make of this. Anyone else experience something similar? What was your outcome?      Pretty sure this might just be AF.