Very new to TTCing...

These tests are not in order sorry. I got the dark line on the 19th then all the light ones everyday after. Does that mean my PEAK could've been the day before like 18th or even 17th? I just got these tests in the mail and decided to not wait until my period to start tracking. I just wanted to see......today is my expected period started date...had very VERY light pinkish brown discharge...just being hopeful