OK ... step one ... you have to get out of panic mode. You can't help your dog if your freaked out. You already taken the first step in solving your dog's issues. IE ... If I don't know the answer find someone that does.
I do see you've asked this question before ... and your still having problems?? I did not review in depth, your other threads but to give you full credit ... this time ... you detailed the problem clearly and also explained why "you" are having this problem ... still.
And just cuz I wanna ... if you want to find "trainers online" that can help you ... at the top of the list would be Jeff Gellman at ... "Solidk9Training" this guy.
Solid K9 Training aggressive dog rehab, dog anxiety - Rehabilitation and Family Dog Training
He has a Youtube page ...
And this year he is doing free 15 minute Skype sessions one a day for all of 2017 ... look to the colume on the right.
Number two and only becasue he does not have quite as high a media profile as Jeff, would be Larry Krohn this guy.:
Dog Training Bowling Green, KY, Nashville , TN, - PakMasters
and he also has a youtube page. :
If you did nothing but study those guys, they have your answer already?? Or listen to Jeff's weekly Q&A and someone else may ask ... or go to his FB and submit a question and he may address you directly??
But ... that said and why you are having problems finding answers is becasue your query is just a little vague ie ... my dog barks to much???
So yeah ... I can see why searching for solutions for "my dog barks to much" ... would be a little tough! I'm pretty good at the finding trainers and information thing myself. But even I would find that question to be a little tough?? But ... to your credit ... in full on freak out mode ... you also outlined the problem you are having.
And frankly your problem is fairly simple. Step one ... is to "STOP" doing what you are currently doing! Stay out of the Dog Parks, stay out of Petco's! No more screwing around with other dogs period! You just ... flat skipped a step ... you kinda sorta skipped over, actually training your dog on how to deal with distractions and gone straight into "Proofing your dog with distractions. And it is thus far ... apparently a miserable fail???
So now you know, "Stop" doing that ... and start over. Walk your dog in a distraction free environment first! Do ... "Sit on the Dog" train "Place" ... show your dog ... how you want him to behave first ... and then take him to "Petco" or high Dog areas for "Proofing" and personally ... I'd stay out of freaking "Dog Parks" in anycase but that's another story.
At anyrate becasue I don't think I can better explain the "Walk" your dog thing, then I already did ... see here.:
And as for training Place which you need to do and Sit on the Dog both of which train calmness into a dog ... see here.:
Fearful, Anxious or Flat Crazy "The Place CommanD - Boxer Forum : Boxer Breed Dog Forums
Walk your Dog, Train Place and do Sit on the Dog ... and stop doing what you are doing, give those things a shot for a week or two and I think you will find yourself in a much different place??
Right now you are actually "training your dog to bark at others dogs" and as you are discovering ... the more a dog gets to practice a behaviour ... "good or bad" the better at he becomes.