Weaning struggles

Looking for some advice, I have started to wean my baby she has been having at least one spoon-feed a day for nearly a month now although she will refuse to eat anything other than banana porridge. I have tried everything from pureed carrots and mashed potatoes to fruits ect. Doesn't seem to matter what it is as soon as it goes in her mouth and she is about to swallow she will gag and gag until she is properly throwing up. Has anyone experienced this or is it just a thing of keep trying her until she stops it?