You are doing alot of the correct things by taking Advil and stretching. You will want to be gentle with the stretching though to allow for time to heal as well.
Moist heat packs and massages would be a great addition to what you are already doing. This will definitely help it to heal quickly.
Now, if you are experiencing pain shooting down your leg, leg numbness or no improvement after 1 week, you must see your provider to be examined and make sure that nothing more is seriously wrong with you.