First of all, I suggest you contact the authorities as you have been a victim of abuse and this kind of behavior on the part of your ex-boyfriend is absolutely intolerable. Secondly, I suggest you seen medical care in the form of a thorough musculoskeletal evaluation which may also include X-rays to make sure there was no fracture
which could be contributing to your pain. With the type of trauma you suffered, it may take some weeks before you feel back at your baseline. I am sorry you have suffered this injury
and I hope you are in a better place both physically and emotionally as well. Take good care.