Please don't apologise about a long post - it helps us to get a picture of what might be going on if we have detail, especially with new members whose background we have no idea of.
Glad you've spoken to your GP about the possibility of gallstones & are already clued up about them. I would pursue it with your GP if the pain continues after her suggested week of wait & see. And yes to CLKD's suggestion of noting what you eat & drink to see if there are any associations with the digestive symptoms.
I did read you can end up triggering IBS whilst using HRT and it's also more likely in meno due to declining hormones?
Mine got worse postmenopause while I was already under a gastroenterologist (not on HRT at that point) & she felt hormone deficiency would certainly be making things worse. A gynae I'd seen a few years before said the same.
Like you, I need both Vagifem & Estriol for VA, but also systemic HRT. As CLKD says, you may need more Vagifem than just 2-3 times a week. I use Estriol (externally) & Vagifem, both 5 nights a week, as recommended by a well respected NHS menopause clinic a few years ago. What a nuisance that you can no longer use the cream. Wondering whether the Estring might suit you for continual release of oestrogen. But simplest in the short term would be to increase the Vagifem. 5 nights a week is usually endorsed as that merely takes the dose up to equivalent of the higher strength Vagifem formulation that was prescribed in the past.
The simplest alternative to Evorel Conti if you do want to persevere with HRT (after a break as your GP's advised) would be to try another combined patch: FemSeven Conti, which has the same dose of oestrogen but a different progestogen. Other than that there's quite a range of oestrogen products you could combine with separate progesterone/progestogen. Many women on here like Estrogel for its flexibility, there's a newish oestrogen spray - Lenzetto & Estradot patches stick well & tend to give good absorption. You probably know that transdermal oestrogen & the lower doses are considered less likely to trigger gallbladder disease.
Utrogestan (capsules taken orally or vaginally) is the form of progesterone most favoured by menopause authorities & many women on here use it, though it doesn't suit me, so I can't recommend it as such!
I do hope your horrible digestive probs ease soon & that you manage to find a suitable regimen to control your meno symptoms. Keep posting & let us know how you get on.