If your orthotics are uncomfortable, you need another appointment to discuss it, get them altered or try something else.
I have some custom made ones and they were really uncomfortable until they were adjusted. Now they are the best thing ever! They have vastly reduced the pain I get in my feet and leg joints (I don't have arthritis, a different condition that causes joint pain).
I have some Earth Spirit sandals with arch support, which are the only footwear I can wear other than my walking boots with my special insoles.