Normal to bleed within the first 3 months of changing any HRT dosage. Forget about it and only pay attention after that.
However, what is this with starting you on 100mcg patch and then persuading you to reduce....?!?! This isn't just about managing symptoms, it's also about making sure you have sufficient estrogen for bone protection and other health benefits of HRT. The NHS is frigging obsessed with the now OUTDATED stuff about 'lowest dose for shortest time' BULL. (Sorry but this is really angry-making.)
If you previously needed 4-5 pumps of gel, in all likelihood you need 100mcg patch which is the equivalent. None of these are 'high' doses, they are within what is licensed. There is no need to reduce down, you are not making anything any better or safer. Obviously if you have symptoms of high estrogen or your bloods show it is ridiculously high, then yes - you would need to try to reduce. But menopause is hard enough without introducing this idea of encouraging you to reduce, when you've only just got started...
By the way, I am on 12 pumps of gel - with serum estradiol of 325pmol, which wasn't high enough at all to help my symptoms. I have now added a 75mcg patch (soon increasing to 100mcg) along with the 12 pumps of gel - the idea is to reduce the gel back down to 6 pumps - because I was able to absorb more at 6 than at 4 (but I haven't absorbed any extra up to 12) - and to increase the patches to even 300 or 400mcg of patches if needed. All this is via Newson Health because the NHS is useless.
I can't believe you had to wait 2.5 YEARS for this. Your own GP should easily have been able to switch you to 100mcg patches. It's a licensed dose. It's nothing you need a meno clinic to approve. Yet again, the NHS proves completely inadequate...