Try walking different directions in chest high water in a pool to take some of the weight off the foot. Get out of the pool on the side so you can dry your foot/leg and put your boot on. If this works then work slowly into the shallower end. Even with a walking boot you can do a recumbent stepper or 4-way hip or seated knee exercises ( LAQ and HSC ). With the Sx you mention it is very possible you did injure surrounding soft tissue as well. You are the patient. If it gives you peace of mind see the doctor again and voice your concerns. Sometimes after an jury like this bone integrity comes first and soft tissue problems may wash out with time or require more of an investigation.

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Spiral Fx can be a booger but xrays indicate the healing progress. In general, weight bearing at the appropriate time is good/stimulating for bone growth . One thing at a time