Unfortunately therapy is a bit hit and miss as you enter secondary school (UK) 11+ elsewhere. It then becomes a case of managing it and we all go through our own shit and experiences. some of us get a bit luckier in life depending on who's around us but it's such a lottery. From my interactions with specialists, stuttering is also a symptom of other issues so it's harder to manage when there's a lot going on. As far as I Know, drugs do not work for stuttering so don't expect much. Definitely shift the focus to your emotional wellbeing as from the list you have above you have a lot on your plate but keep going for yourself and your kids. I'm 34/m with no kids but I know it must be painful that you can't express yourself with them. Maybe look into family therapy with an SLP and see how it goes. Keep going and honestly your kids will love you regardless of how you sound.