Implantation bleeding

Juli • Ttc #1 since June 2015. Laparoscopy to remove endo in July 2016. After 6 failed IUIs, we are starting ivf in April 2017!
For those of you who have experienced implantation bleeding, were you cramping pretty badly? I'm very very lightly brown spotting but am cramping pretty severely. I always have a very light first day of AF but AF isn't due until the 19th for me and I'm only 10-11 dpo. And this is super light mostly just when I wipe. Thoughts???