I think I'm having implantation bleeding?

Brittany β€’ Our baby boy born July 2016 πŸ’™ Our angel baby was taken Oct 2018 πŸ’” Pregnant with our Rainbow baby!🌈 Due Aug 2019 🌈
I had one spotting sat night. Brown, light when I wiped. 2-3 spottings on Sun. Then one this morning. So I'm still in the 48 hour period I guess. None of the spottings have been red or heavy. I've never watched my discharge so much in my life. I'm supposed to have AF on this coming sat. Fingers crossed that it is IB and not an early AF. Please β™‘ Gonna be a long week