Custody trial

The first thing you should do is talk with a lawyer about whether an appeal would make sense.

Courts have a principle called "res judicata," which is a Latin phrase meaning, roughly, the matter has been decided by the court.  That principle means that you don't get "two bites at the apple," a do-over on the exact same case.  An appeal is the only way you can properly challenge a bad decision.

If you move to a different county, though, that might change the case enough that you can get back into court.  The grandparents might start the process, because you would have made their visitation more difficult.  You need to get into the brutal details of this, with a good lawyer, to figure out what makes the most sense for you and for the child.