Hello, i can sense your confusion and worry as you obviously don't want want to make a rushed decision and regret it later. No one else but only you can take this decision for yourself. You should make a career plan for  yourself and decide. Evaluate your career options, what prospects do you have after your graduation, and then compare it to what your position will be if your pursue your law degree now . If you really want to be a lawyer, you should go for the NLU option as then our Sociology degree won't really matter much academically

you also have the option to complete your graduation now, and then give the DU LLB entrance or even CLAT again.