Have you ever found yourself wondering "What is my meaning in life?" You are not alone. Many people feel like they are in the wrong careers or the wrong areas of study. It is common to find yourself thinking "if only I had done X when I was younger, I wouldn't be where I am today." Or "I'm too old to do X." These kinds of thoughts tap into universal human dilemmas; meaninglessness, regret, mortality, and fear of the unknown. You are not alone in thinking them.
If you are ready to make a big change in your life, or at least to explore your options, then it might be time to seek counselling. "The best time to plant a tree was thirty years ago. The second best time is now."