Help with stuttering.

Help with stuttering. I have a really bad stuttering problem. When I speak or read something out loud I just can’t speak without stuttering. I say the first syllable repeatedly or the first word. I say it a million times before getting through the whole word/sentence. It feels like I can’t physically say it and I have to force the sounds out, sometimes yelling them. It’s not all the time, but common enough that it’s a hindrance for me. I feel like I can’t breathe either during it. Does anyone have suggestions on tactics that could help me? I can’t afford a speech therapist or anything, and nothing online I’ve found has helped me.