I am so sorry to hear you are injured. I know it can feel incredibly frustrating in moments like this. I would recommend shifting your focus from training to recovery. Put in the effort to do anything that makes your foot feel better even if that means resting, ice, and easy walks. You will miss some training but I would rather see you take one or two weeks super easy and be 100% rather than try to push through and have you have pain for months to come. Sometimes taking a full stop is the best thing you can do as hard as it is. I would add in some cycling if that doesn’t hurt, do the strength training that does hurt but also back off from the volume to give your body that energy to heal. Once you come back from injury ease back into the training don’t just jump to whatever week you think you should be at. Instead, go back a week or two from where you are now and ramp up again. Again, I know this is frustrating having dealt with injuries my whole athletic career I sympathize. Don’t worry about falling behind in your training, you can’t force yourself to heal faster. We all have to train at our own pace-if you use 15 weeks to do a 12-week program that is totally okay! I hope that helps and answers your question! Start that healing process!!!!