in other threads people tell me it is possible to be on HRT for sometime before being outed. so i have an number of questions:

I know everyone is different but i would be useful to have different people experience and an average:
1) after how many months do the changes become noticeable and impossible to hide?
2) after how much time does the face look more feminine.
3) if i need to stop the HRT treatment what would be the effects on me? would i get crazy? 

1) For me, six months things became pretty noticeable, and probably impossible to hide.
2) I took pictures from the beginning, and I would say that after a couple months my face started to soften a little.  Around three months one of my friends told me I was starting to look androgynous.
3) I had to stop hormones for about 2 weeks for FFS (1 week prior, and 4 days after).  For me, I didn't get "Crazy", but I could definitely tell they weren't there towards the end of the time I was off.  When I started the hormones back up, I was extra moody for about a month.

Hope that helps.  Your results will vary of course, but these were my experiences.

I ordered hormone patches, so let me see how fast/slow i will see the effects.  For the moment i am more concerned about being at peace and the mental effects.

Patches were having a roller coaster effect on my hormone levels, since there was not assurance that one of the patches would or would not detach during the few days I applied it, so I switched to injections, and researched the right dose to get stability for maybe 3 months with regular checks and reevaluation of dosage... and now, It's OK for me.

I'm just wondering how to minimize the time without estradiol injection when I receive my FFS, next year. I'm going to discuss this with Dr Ousterhout when I go for the preliminary consulation, later this month.

when I quit this summer to "give maleness another try,(wtf was i thinking?), I wound up having major night sweats and some hot flashes. If you quit, do it gradually. Waking up completely covered in sweat, not cool.

1) after how many months do the changes become noticeable and impossible to hide?

3 months now on HRT

The breasts and nipples if I push my chest in front you can definitely see a pointy nipple and a small hump, we cannot call it a breast yet but the nipples are really perky.

2) after how much time does the face look more feminine.

Fats have accumulated in the cheek area, facial hair growing at a lesser rate and all acne and pimple vanished in the thin air and my skin in back like I was in my early teens.

3) if i need to stop the HRT treatment what would be the effects on me? would i get crazy?

Due to financial reasons at times I ran out of hormones, well I notice I become horny again and wanna masturbate when generally on HRT all sex drvie is dead for me.