Aiyoh, that must be scary! Appendicitis during pregnancy is definitely something that needs urgent medical attention, so please see your doctor or go to the hospital straightaway if you're having severe abdominal pain, they will know how to handle it safely for both you and baby. A few of us in my mum group have friends who went through emergency surgery while pregnant, and honestly the doctors are quite experienced with managing it, but it really depends on which trimester you're in and how urgent things are, so you need proper medical assessment asap rather than waiting to hear from others online.