Pregnancy - Second Trimester

Before getting pregnant I always wondered why pregnant women always say "I'm 18 weeks pregnant" and not just say "I'm 4 months pregnant." Now I completely understand. Getting through each week is a huge milestone in pregnancy, so it makes perfect sense to count each week that you successfully complete. Now that I've turned into a week counting pregnant woman (18w5d to be exact) time seems to go by sooo slow. Each day is a milestone, let alone getting to a new week.