Hi Aspie
This happened to me last month. No bleed at all.
I was on a 50 patch and 100mg Utrogestan for 12 days and I did this for about 3 months, for the previous 2 months I'd had a bleed (during the Utrogestan phase, but that's another story). All the symptoms were coming back, so I had bloods taken in early August and a scan done in September (taken just before the bleed was due, but I didn't have one). Any way with one thing and another, I didn't get my results until about mid Sept.
So, bloods taken in August showed very low oestrogen and prog, and very high FSH. And scan showed 7mm lining. And I didn't get a bleed in September.
I'm now on a 75 patch, and for this cycle I upped the Utrogestan to 200mg for 14 days (still taking it, last dose tomorrow night). And started my bleed 8 days into this regime. It's not particularly heavy, but I'm surprised that the bleed keeps happening during the prog part of my cycle, if I have one at all (was doing this on norethisterone too, which ist why I thought I'd give the Utrogestan a go). And given my oestrogen levels were so low, I was surprised at the thickness of my lining, and yet no bleed even though prog levels were almost undetectable....so who knows really. I've had three lots of blood tests in the last year which are all pointing to post meno readings, so again who knows?
Anyway, I'm off to a gynae at the end of this month because I have suspected adenomyosis...
I suspect you're right about the low dose of oestrogen not giving you a very thick lining, but it seems odd to me that your dr is letting you go longer and longer with unopposed oestrogen. I know some ladies are on longer (3 month) cycles though.
Are you having any other meno symptoms? And have you had a recent scan to check the uterine lining?