If the stutter occurs when you explain things to people, perhaps instead of reading aloud you could try exposure therapy techniques with having you explain things to people? Congrats on mastering reading aloud too - that's great. You could start with a mirror or filming yourself explaining a concept for about 2-3 minutes. My personal experiences with stuttering is that successes (even the smallest ones) breed more successes and confidence can be very helpful. I'm in my mid thirties now, but my 24 year-old self would marvel at the fact I don't have a panic attack any more each time I have to make a phone call. My stutter really improved in my late-20s when I started speaking regularly in front of a small group of supportive strangers - I found that Toastmasters was a good fit/avenue for me. Also, as time got on, the anxiety over stuttering dramatically decreased as I realized that no one really cares if I'd stutter, I had valid and important things to say, and I was finally tired of being embarrassed about my stutter. I barely notice my stutter anymore - it's still there, but hardly anyone else speaks with perfect fluency.