Advice on crazy AF's!!

Cheyenne • My husband and I are pregnant with our second after a year of trying! We are thrilled!
So, in June I had a normal period and in July I had skipped a period and thought I was preg, with all neg tests throught July. I had a pretty normal AF in Aug, and then in Sept it was when AF was suppose to show up, but it was basically just light spotting for less than 24hrs. Any opinions/advice on if that could be implantation bleeding and if I should wait to take a preg test? My AF is due in 8days.