Depressed about my future

Hello. I appreciate you taking time out of your day to read this. I'm 24, married, and work a full time office job and I'm a photographer on the side. I feel like a complete failure- like I could be doing more and I've not lived up to me "potential." I've not done what I thought I would in college and I can't take a vacation or travel or much of anything. I feel unfulfilled, disappointed in myself, and that life is passing me by. At the moment, I don't have the client base to do photography full time. I've been considering going into real estate, but I don't know if I could handle working all the time with people. I feel like if I had kids, they would grow up to be disappointed in me. Oh and we can't afford kids either, but I pretty much dream about getting pregnant. Help? 😥