Trimesters???

💙Nikki • Nikki Shortt
Ok so this is my first pregnancy and I always always forget to ask my Ob. I read about the trimesters and when they start all my books are different and <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">Nurture</a> said welcome to your third trimester. I am 26 weeks 5 days. Is there anything on the web that is accurate?