I do believe I'm on the right path. 
Every now and then I'm reminded of that, particularly when I'm feeling like a bit of a failure! I was at a music concert last night and exchanged a few words with the person next to me. Turns out, she is a physician, having started her studies in her thirties. 
She was so supportive of my decision - great boost to my day. 
Onward and upward!