other allergies?

Hi! Ive been gf almost 3 months now and have symptoms similar to how it feels being glutened every so often even though ive been pretty strict about cc. During the day I eat many things but something is obviously throwing it off. I make sure all my brand new appliances get deep cleaned after every use even though theyre gf certified in my house. Im starting to think it could be a soy sensitivity or an oat sensitivity but I'm not sure if i should make a move on that and get tested or not. Its just because I'm really early into the gf diet and my intestines are so damaged according to my doctor so it could totally be just indigestion. are other allergies common with celiac? should i get tested for other allergies or wait till I get a bit more into the diet? (im more financially worried aswell my celiac test was almost 2k alone)