If your off hand isn’t used to doing much, say like 90% of us urban folk, upping the strength requirements will definitely result in soreness. It’s like never working out with weights and jumping in with trying to bench what your BFF can. Just asking for trouble. Rest, ice if needed and NSAIDs as needed to get back to pain free living. Once you get back to pain free living, start slow and do hand/wrist exercises bilaterally.