Ovulation?

This is my first time I have ever done anything with taking ovulation test. I've been on birth control since I was 14, using Nexplanon and then I had it removed on June 30th and took the pill for a total week then decided I was ready to have a baby. I received my first period in 6 years on August 19th threw August 22nd - so only for four days - according to Glow today was my predicted ovulation date and I had sex Friday because that was the biggest percentage (33%) of getting pregnant. I'm just curious to know if the one from 9/2 (today) is a positive and the one from 9/1 isn't! So I took another one today 9/3 and I'm not sure if it's darker than the one from 9/2 or what, trying to pinpoint when I'm going to ovulate and I had sex Sunday morning so I'm assuming I ovulated on 9/2 - and I had sex Friday just trying to pinpoint my ovulation!