OK, we get that you're a little nervous

Take a deep breath and we'll try to help you out (it's what we do around here) ...and we're glad you joined us and are asking for input.
What's BB? How much are you taking? How often?
How much fenugreek? How often?
How much wild yam? How often?
I think your chances of cancer are no greater taking herbs than if not, but no one has proven it beyond doubt. Personally, I think you're stressing out too much over it.
If you're as nervous with the pill bottles as you appear in your posts, I bet more pills are hitting the floor than going down the hatch.

(I'm just trying to help you lighten up a little). How much thought have you put into your decision to use herbs? It's not something you should jump into with out careful consideration. Not the cancer, I'm talking about how your life might be changed if your body changes. The herbs might quell your GID OR they might escalate those feelings. Are you SURE your wife / SO is OK with all that? Have you told her EVERYTHING??? ...You've got plenty of time and listening ears to air this out, specifically the emotions, potential physical changes, relationship concerns and choice of herbs and doses. Nothing you're currently doing will hurt you or change anything permanently. It will take several months minimum to cause any permanent changes or "physical harm".