yes you can re-break an arm but it will take an x-ray and a careful examination to make that determination. the fact that your arm is hurting more and more each day is an indication that you need to seek hands-on medical care. while there are many other non-fracture reasons for arm pain these cannot be sorted out blindly over the internet.
did i re-break my arm? . i have a proximal humerus break. it happened about 9 weeks ago. this week was my last appointment my doctor said it was healing well. i had full range of motion back and was working on strength and it rarely ever hurt. he said i was good to go and don't need to come back. . then a few days ago i fell and caught myself with both arms. when it happened there was pain but it went away quickly and my arm felt fine again. slowly it has been hurting more and more. did i upset it? or did i re-break it?