Faint line - No postpartum Period yet

I am EBF my 9.5 month old and have yet to get my period back. We started TTC June 1st but have no clue if I was actually ovulating or not. I'm kicking myself now that I didn't track sooner.

Anyways, I decided to take a test on Saturday because I had been having weird symptoms. Extremely irritable/moody, acne, heartburn at night, more tired than usual, boobs feel heavy, and just had a feeling I could be pregnant.

I got the early response (equate) blue line and took the test. A very faint line appeared within 10 mins, but all other tests since have been negative with pink lines. Could it be my period getting ready to come back or is it still too early to test?

I've heard of the evaporation line, but this appeared prior to 10 mins. Help!!