Hi awe,
This the juicer I use. There is basically two major families of juicer, one much more expensive that crush the vegetable and let you juice leaves better (they look more annoying to clean) and one family containing the breville that rotate fast. This model is small and let you make a big glass at the time, I don't have much space so it is good for me, I think they have a bigger model if you prefer.
You can buy a cheese clothe, put the pulp of cabbage in it and twist the clothe to extract the juice while waiting for your juicer.
If you have exams, it is not the right time to do the cabbage juice, it will make you feel tired. Also you should not take it for too long either, the longest I read was a week-10 days. I did it every now and then for two to three days.
The tingling in your stomach with pepzin GI is the ulcers healing from what I read. You should take it with your meal: one at breakfast, one at dinner. It is the most important supplement since it is the one that heals you. If you feel something, it is working.
Have you tried slippery elm 2 caps between meals with one or two big glasses of lukewarm water? Not everything works for everyone. On the bottle they recommend 4 caps, but for some reason that was not working for me, only 2 caps worked well. Also I did not take it at first, I took DGL for a month than it was not working as well anymore and I started slippery elm which seems to work better then, so I took both.
Whatever you do, medication or natural supplements, it is going to take a while. But you are going to feel slowly better and better. I have not had pain or excess acid for a while but I feel my stomach is still recovering slowly as with time I tolerate more and more types of foods. I started trying to cure myself at the beginning of the year.
Medication might be easier for you now. By preventing your stomach to produce acid, it will heal more easily. I really don't like medication, it makes me anxious to take it because I am afraid of sides effect but sometimes it is the best way to go. As long as you don't stay on it forever, it should be fine. If you do that, the diet is important anyway to speed up things and stay well. Have you seen a doctor? If you don't take the medication, pepzin gi is the only thing that really helps cure your stomach in an acidic environment.