What birth control are you going to use after having a baby!!!

Sophie • Mummy to a beauiful baby boy 15 months 💙👪💫family is everything @sophie_halex
2012 I currently got the copper coil in periods where painful and long but nothing different as I've always exsperience this 2015  I got sharp pains down my left side periods would like 10-14 weeks had ultrersounds had fluid on my left side an cysts on my overies therefore I got the coil out... I'm currently 4 months preganant and Donno what contraception I will go on after birth as I've got under active thyroid and put weight on easy an the IUD coil was the best with no hormones but will this happen again!! What is best for you no weight gain as still have periods 😊 help! X