For those of you who managed to control their stutters, how did you do it? How long did it take?

For those of you who managed to control their stutters, how did you do it? How long did it take? I'm literally thinking of dropping out of university, going back to my hometown work watever job, to get 45minutes sessions X2 per week with an experienced speech therapist I know for at least the next 2 years! He doesn't offer on-line sessions. I don't like my CS degree and my mental, physical etc health is very bad. I'm 25F btw. This is the biggest problem in my life, and I want to at least learn to control it, I can't go on like that anymore. Should I do it? Is it a bad idea? I feel guilty given my old age and that I haven't progressed in my career and it feels like a failure. But then again, I don't like this degree. And I don't know what I would like to do as a job. I could always go back to university but I'd have to retake my exams and start university much much later. But what if therapy won't pay off? What if I waste another 2 years trying to grow another limb?