Need help!! Late implantation or AF!

Carly

Hi ladies so we've been trying for 6 weeks but my LMP was 19-23rd august... normally really heavy and painful and it was in august. Been baby dancing everyday if not every other day for 4 weeks after this period. Between the 10-21 I had been having sore books being sick once and loads of nausea I'm extremely bloated. On the 21st sept I started spotting red/brown blood this lasted untill 25th sept no period like cramps just spotting only enough for panty liner. Taken numerous hpt and all negative. I'm going crazy! Could this be AF?!