With my first, I was saying how many days she was and then we did weeks and months for a while...but she was my only. When my second came along when she was 22 months old, I did months for him because after a week, I couldn't keep up. When my third was born 23 months later, after the first week, people would ask how old he was and I would politely say "He was born on March 12th." lol - I couldn't keep up with it at all! You're totally fine!!!