I think that if you enjoy history more than anything else you should go for it.
I've changed my major at least 3 times, and I think I've finally found something to stick with
I think of it this way: Do what makes you happy. If you won't be happy going to work every day as an Occupational Therapist and would be very happy doing something with history, you should do what makes you happy and what you like. It's like being paid for what you like to already do!
On the flip side, (my boyfriends father would always tell me this: ) a degree is just a piece of paper that says you studied something in college. It doesn't mean that you absolutely have to go into the field you studied in college (of course I'm sure it helps since you will have the background if you majored in it).