Can this happen?

I had my nexplanon removed June 21st and I haven’t had a full period yet! I have had crazy spotting but nothing else. On August 17th I woke up early in the morning and I seriously thought I had started it was dark red just like a regular period and then by 11 that morning it was gone. Absolutely nothing!! I don’t think it was implantation bleeding because it was kinda A LOT when I first seen it. But I’m having so symptoms but test are negative! Am I testing to soon? Will my actual period start soon I’m going on week 9. I want another baby SO bad! Somebody help