How long will it take before my tongue gives up the gag reflex on Dentures?

I am 35, just had my operation on Friday and was inserted with a full upper denture. I have to wait until February for the gums and bone to heal before I get the bottom partials. I was fine until later in the evening on Friday when my gag reflex started going so I had to take them out. However when sleeping I didn't notice them. I have tried many times in the last 2 days to deal with the issue and it seems to be getting better, but my gums are still sore and trying to talk with them makes me sound funny. So there are actually 2 questions. Will the gag reflex stop with continued usage and how can I eat or is it when the gums are healed fully that I can put pressure on the upper dentures to eat a broader choice of foods than the blended diet I am currently using.