Hi mlk,
+1 to scorpiogal's suggestion. As you are doing managerial work, adding a PMP certification will help you get a comprehensive understanding of how a project execution is done and the best practices involved. PMP certification coupled with your experience would be a great combination for you to pitch for the next level in your career.
In 2 yrs moving from QA Analyst to QA lead and handling management activities is simply great. Wish you the best for your future and the same pace for your career growth
-Lakshmi