Anyone with braces?

le

I’ve started my treatment long before I got pregnant, and it’s been 1.5 years now. On my last treatment I told my dentist that we have a deadline and our last treatment should be in July to take them out. Where he replied “we might be ready by that time”. I know we fixed almost all issues in my mouth, but he just wants to keep them as long as possible. Is it okay if I insist next time that we must be done by July? For some reason one of the doctors friends told me that you don’t want to breastfeed with braces but she didn’t elaborate. What do you think?