In general, sativas tend to impart more of a head high than a body high, meaning that they are usually not the first choice to help with chronic pain and for some people, sativas can be anxiety inducing. A sativa may help you though, as everyone is different. The only way to really know is to try it.
I’m not a doctor, but I think if you were to go to a dispensary and ask this question, they would steer you to an indica or high CBD product, or both. CBD can help with pain and anxiety, and indicas are known for their body highs, which can also good for pain.