Mine started about a month after I finished. Luckily I have quite a lot of hair but it still scared the life out of me.
It lasted about 2 month's i think before it stopped.
My pharmacist told me that it usually happens around the 3 month mark and the process starts long before that so if you have been doing it for say 6 weeks, even if you stopped your hair would still fall out.
What you have to remember is though that it will stop and you won't be left with patches, it does seem to fall out quite evenly. I could really see it at the front.
I now have tufts of hair where it is growing back!
It doesn't happen to everyone though, you may be fine x