Hi V.-
Your milk will come all the way back, don't worry.
The same thing happened to my son. I ended by going back and nursing him pretty much full-time until he was a year and a half. Mine couldn't stand it if I drank coffee or tea, ate citrus, or ate melon. He'd get colic.
When I tried to wean him at nine months, he scared me to death- he failed to thrive on all the normal options. My friendly local Whole Foods and Trader Joe's clerks had suggestions when I asked. Most likely, also, it is not just wheat and oats, but anything with gluten in it.(You already knew that, huh?) Potatoes are OK, I think, so if your husband is a meat and potatoes and hopefully a salad and veggie, plus some yummy blueberries or something kind of guy, you've got dinner. Breakfast tends to be a problem, but the frozen food section should have Van's gluten, dairy, and egg-free waffles you put in the toaster. I use turkey bacon, which is pretty good, smear the waffles with nut butter, and use rice syrup over the top. Or offer your husband his own condiments breakfast/meat plate. We are allergic to eggs, too, so I've removed them from the diet. You can cook up new potatoes ahead of time, then brown them in olive oil and eat with a pile of the turkey bacon in the morning. Always some fruit, too. We eat a lot of steamed rice, veggies, and chicken. I have been experimenting with a cream cheese substitute on the Bhutanese red rice bread, along with very thin slices of lox. Very good.
Nut butters (such as almond or cashew if he can tolerate those) on Bhutanese red rice bread with a little rice syrup to moisten and sweeten works for me for lunch. Some of the noodles from Asia don't have gluten- thy're based on beans or rice. Oh, yes, forgot to mention that huge staple- beans and rice. The South American recipe, with spicy (or not, depending on your little guy) Italian sausage in the bean sauce, can be very good, and very nutritious.
Hope it helps- S.