I Am Trying To Take The Medicine Sucralfate One Gram

I am trying to take the medicine sucralfate one gram and the way that my daily diet works is counterintuitive 2 the instructions on the bottle. My doctor told me to go ahead and take it anyways but it seems that it is causing me to vomit up acid reflux every time I don't feel my stomach 1 hour after taking the medicine. The issue that I am dealing with is I have some kind of sore in my esophagus that is not healing and every time I eat it is extremely painful the sore needs to heal do you have an alternative medication that I might suggest to my doctor.