Personally, and I've used enzymes, probiotics and betaine HCL, I've found the most positive impact on my digestion from the HCL. When are you taking it? You are supposed to take it at the end of the meal (sometimes I take it in the middle). If you are feeling uncomfortable from it when taking it right after a meal, I would think you don't need it. You may also feel a little warmth/activity from it, but if it is uncomfortable/painful I'd say don't use it. (You may be able to find a lower dose--not sure--I'd look into it though--taking too much will totally cause discomfort.) You mentioned tablets, but just wanted to share that if its a capsule be sure to keep it enclosed (don't open the capsule and pour it on food) or that could def. cause gerd/heartburn issues (burning on the way down).
Don't know much about the rest, but HTH!