I tested FMU on 9dpo and it came up negative, then that night I felt a "stabbing" pain on my left side and I knew it was implantation pain. Two days later FMU I got both BFP. This was our 3rd cycle trying and the thing we did differently was start having sex every other day once period ended, I stopped drinking caffeine, use ovulation strips to pinpoint exactly, and ate pineapple      core after ovulation. My symptoms were back ache, tired, and indigestion (non-stop burping). Hope this helps!!!