My AF only 3days is it implantation bleeding

Overylinda

Hi ladies, I am trying to TTC my 5th baby in my mid 40s. I find last 3 months periods my cycle days are regular between 28 to 30 days, however the AF only last for 2 to 3 days.

My last AF came from the 9 to 11 Dec, AF came a 3 days earlier. I thought was implantation bleed, as started with spotting with light stain and very little. I only use 4 parties liner through 2 days and one pad at night.

Did anyone encounter this? Is the a sign of menopause?