Hi swisssoundbox and welcome! I personally am not pumping yet…holding out for the combo CGM/pump. I’ve had the same problem with lower back placement of my sensor.
I wear a CGM but always bring some glucose tabs with me. I like to transport them in a pill vial…there’s one prescription vial size that fits them perfectly. I know at what point in my practice that I tend to go low and keep a close eye on it. I am always conscious of whether my CGM is properly “trained” and, if so, I eat some glucose when I get to about 80. If it hasn’t been trained, and I don’t trust what it’s telling me, I go by how I feel. Usually, my bG will stabilize just where I expect it to, and I don’t need any glucose. But I do always have it with me.