Your thoughts?!

Hanna • DH and I have been together since I was 14. I`m now 21. We are TTC after 1 mc. Have a 3 year old baby girl, Kinley. :)
I am having every pregnancy symptom in the book! Even had what I think is implantation spotting on the 26th and 27th. I ovulated on the 18th. But still no positive test. I NEVER bleed midcycle. I'm supposed to start my period on September 2nd. What are your thoughts? Is it just too early??