hi this isn't my first baby it's actually my 2nd but i have a different doctor now and she told me the the second trimester starts at 16 weeks, which i am confused by once i was 14 weeks with my son i was told i was already in my second trimester and some <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">pregnancy apps</a> tell me that i am already in my 2nd and I'm 13 weeks. What do you guys think? when does the 2nd trimester start? it's just kinda annoying