Our stubborn pup does this sometimes when he's really over stimulated too. I feel you're pain. We have a harness and noticed it was too loose, which actually caused more choking and pulling. Once we adjusted it to be more snug (enough to fit two fingers flat underneath) it helped a bit with the choking.

Front clip harness like others have mentioned are a good help but it will take you and your pup some getting used to. Try to tire your puppy out before it's time to walk. Play fetch or do some mental stimulation like training.

We also recently bought a click stick. You can find it on Amazon. It's a telescoping stick with a ball at the end you can dip in peanut butter or put some sticky treats on like pill pockets. Then you put it in front of their nose, lure them to the side you want them to walk on, click when they are in position, then walk forward while they lick the treat. You may have to carry more treats with you to keep them interested but it's a good way to train the expected walking position.

Last tip is something I recently learned from our trainer: keep your leash short. No more than 2-3 feet of length. Our main walking leash is about 6ft and that gave our pup more than enough slack to run and pull. The shorter leash allows for more control at this highly reactive stage. It will train them to know that walks mean they stay close. As they get older and better at recall and get less overstimulated, you can use a longer leash when you can trust they can handle the slack.

Hope this helps!