What would you do? Is this Normal?

Im 28 weeks with healthy di/di twins. I’m in a lot of pain lately and don’t know if it’s normal or not. My pelvis hurts if do house work(feels shakey/sore), my back is constantly killing me, I keep getting “lightning crotch” off and on, and when sitting in the car I feel like I’m cramping. I can’t tell if the crampy feeling is gas or something else and it’s down low. I’m not sure if these are all normal or signs of something else. I have a Dr appt in two days. Would you wait to see Dr or call? This is my first pregnancy and I don’t want to seem overly concerned about things.