Pregnancy test

I am irregular so usually I’ll wait for 1.5 months after my last menstrual period. However for my case, the first day of my LMP was 11 Oct. I tested negative on 21 Nov with a Clearblue digital kit. Then I tested postive on 6 Dec with a Clearblue normal kit. Tested again with a digital one and my conception was 2-3 weeks prior. I’m now 15 weeks. 🤷🏻‍♀️ I am confused myself, but it’s okay. Baby is healthy and growing well. 2nd pregnancy here. ☺️