Oh gosh, I'm sorry to hear. I wouldn't immediately think cancer though. Gerd that is uncontrolled can cause ulcers. I would tend to think it is more that. Unfortunately, you are going to have to get to a doctor. Urgent care around you? They sometimes take people on a basis of pay out of pocket at reduced rates based on income and are more like a regular care physician than an ER type of situation. So, is that something you can do? I agree that losing weight is a long process but does definitely help with gastric reflux. We have a group of us trying to lose a bit of weight and chatting about it on the weight loss and dieting community. Here is the link: https://www.medhelp.org/posts/Weight-Loss--Dieting/HOLIDAY-WEIGHT-LOSS-CHALLENGE-2018/show/3038284#post_14400540
Sometimes it helps to have friends and supporters for such endeavors! :>))
Mike, having experienced thyroid cancer in 2003 I feel it would be advisable to seek professional medical assessment. Having no insurance isn't great but I feel there are places which could guide you to assistance. It would be far wiser to seek medical consult than to wait. This could also be something very easily corrected. Most cities of any size have free medical clinics which could be a good first start for you. Be proactive concerning this.
You should see a GI or ENT doctor for further workup and management.