
Welcome to these forums!
There are a couple of states that will allow you to challenge the LPN/LVN boards if certain qualifications are met, but the LPN licensure you receive is often limited, and can never be endorsed to any other states.
This may not be the advice you'd like to particularly hear, but I suggest you complete the last 3 courses at the school where you're feeling uncomfortable. When you look back years from now, you hopefully won't regret sucking it up and taking the courses.
Good luck with whatever you decide!