How does one know when they are living from their hearts & fulfilling their dharma (destiny) or living from self-will & shutting themselves off amrita, the nectar of life? Because either way, it could feel like longing, like striving. And either way, one could accomplish very great things. The pursuit itself can be very exciting, thus leaving us confused as to whether it's the right thing for us to do.
Here's the thing: you need to know your heart intimately & at some point, it'll become clear. Meditate & you'll connect to the purest parts of yourself (& the Universe). When immersed in Truth, Love, Beauty, Freedom, suddenly everything comes into focus & the right action springs forth effortlessly. You navigate life with an intangible compass & your heart is the captain.
So, you ask if you've steered off course? Close your eyes & contemplate how you feel. Once you'll have traveled the landscape of your emotions and arrived at the sea of plenitude, no word will be needed anymore.