AF question

Okay, so my periods started back normal after having my daughter. We started TTC about a month later. After five months of it being normal it would randomly stop. Since september I have only had one technical period, and have had "spotting" periods. They were so light I coyld have used one pad for the whole 8 days. I'm curious to see if anyone else has had supper light periods, and if so did it affect your ovulation? My ob said everything was fine back in February and all the tests came back normal. I'm not sure if I should find another doctor to get a secobd opinion or what. I also use two different tracking apps. Glow said I am 9 days late for AF, and the other says I am still in my tww. Please help.