Tandem nursing and Forceful Let-down

I'm nursing a 2 yo toddler approximately 4-5 times a day and a 3 week old newborn. My newborn seems to be struggling with forceful let-down. The symptom include:

• Gagging/choking/gulping/gasping/cough while nursing,
• Pull off the breast often while nursing
• Make a clicking sound when nursing
• Spit up very often and/or tend to be very gassy

I can feel my let down in the sides of my breasts. This is the first time that I've actually felt the let down.

Has anyone experienced this issue while tandem nursing and how did you deal with the issue? I don't want to wean my 2yo because of an oversupply issue but I also don't want an overly fussy and uncomfortable newborn.

Thanks!