Just being stuck in a my job...

I'm 34 I have worked in pharmaceutical manufacturing for more than a decade. However I feel like I never got to live out my dreams. I never got a career I really wanted. I didn't finish college and owe entirely to much to the student loan people to go back. I'm almost maxed out. I make a pretty decent salary, but I'm not happy and I feel like I could do more, like I totally missed out. I stay where I'm at because I need the money because I have kids and I have bills. But I just wish I could re graduate high school go to college and do what I want.

What do you do in my circumstance? What do you recommend? Do I just bite the bullet and work a job I'm minimally happy at for like the next 30 years or what? Is it possible I missed my window of opportunity? What's your thoughts?