i conceived with ivf twin pregnancy.suffered sub chorionic hemmorraghe at 9weeks to twin 1 but resolved by 12weeks.cervical cerlage done at 14weeks as precaution as i had lower abdomen and belly button pain i still have lower abdomen pain especially in the night on right side.my doc says its maybe ligament.my cervical length is 3cms at 12weeks.another gyn asked me to take susten and tilidan retard is it safe.i was taking them earlier but ivf doc stoppedat 12weeks but gyn doc says continue.im 29years old.