It sounds like candida. Do the non-scientific/non-accurate “spit test” to see whether you have the jellyfish tentacles. In general, anyone who has done antibiotics has some kind of candida problem or flora problem, so I’d say its a safe bet that you have it.
One question I have: Did you do the “triple therapy” to try to cure your Helicobacter pylori? Did this work? It sounds like it didn’t.
Probiotics are the top thing you will need if you’ve done antibiotics, followed by plenty of rest and water. Supplements and a good plan are important as well. Antibiotics remove all flora from your gut, the good and the bad. Probiotics only add the good flora back into your gut which is what you need for sure.
The diarrhea color also indicates a deficiency/problem (not sure which one), because it should be a brown/green color when healthy.
The anti-candida diet has proven to cure more than just candida for folks; it can cure allergies, cancer, migraines, IBS, depression and all sorts of other chronic ailments and problems. I highly encourage you to start the diet.
On a side note: don’t do the clay and psyllium husk treatment because it is not recommended.