Hi, I have the opposite problem. I have low arches, and plantar fasciitis. Do you have orthotics made yet? If not, see if you can get some that you know work. The worst is trying to use the running store ones if you really have an issue. Some people it works, others, not so good.
When you get orthotics people think they still need motion control shoes. Not the case. Then you are overdoing it.
The only store I have found that understood this was roadrunner sports. They have a couple of stores but mostly sell online. They are really, really good. The people on the phones are awesome and understood how orthotics work. If you can find a running store that is good, go there, but I found that even though they watch you run, many of them don't really understand the function of orthotics and how they work. I have to say I was pretty surprised when the woman on the phone knew more than a person I met at the running store. Give them a shot, I think they are awesome! They also have a good return policy. Even though they deduct shipping, most running stores want you to use them on a treadmill and give you 30 days. Roadrunner gives you 90 (double check to make sure they still offer this). I bought trail shoes and trust me, there is a big difference between trail running and running on a treadmill. They worked on the treadmill but I felt every rock and stick on the trail. I personally hate that. Good luck!