Might have made a massive financial mistake with health insurance. Can it be corrected?

My wife and I both have held seperate health insurance policies. my son was born early and has been and will continue to be in the NICU.

Ive been low on sleep, and combing both policies for which one is the best add.

We decided on adding him to my wife’s insurance late this week.

tonight, I realized I may have misunderstood a provision in my policy about co insurance. in that case; my insurance is the far better one to add my son too, and could save us thousands of dollars.

We are well within her 30 day Qualifying event window, and my 60 day window.

Question is, can this be undone? can we cancel his enrollment in her plan, and move to mine?