Spotting

Just want a little advice please ladies, i have experienced spotting now for the last 3 days, which is light not visable when i wipe but in my knickers. It started off a brownish colour but today more redy! I am driving myself crazy 'googling' what it could be. My partner and i have been TTC for the last 6 months, and my next period is due on the 6th April, i have read that it could be implantation bleeding, has anyone else experienced this or can make it any clearer to me?

Thanks