A total MtF nightmare!!!! I sometimes wake up in night sweats thinking the very same thing.
On another note, congrats. Hair is very much genetic! there are some guys that are extremely hairy and some that are not so much. You seem to have been born to be an extremely hairy man

From my experiences with puberty, and the fact that testosterone is very fast acting I would say it seems normal. When puberty started for me I was hairy within a very small time frame. In fact, I knew a kid in school that went from non hairy, to having a full mustache almost overnight before everyone else!
There are other people who grew some facial hair but not much body hair. And it took them a long time to grow that body hair...
Me for instance I only grew like 20 strands of back hair in my entire life but my arms could rival sasquatch.