False awakenings really can suck, and you've just basically had a rough crash course on it. I can't say I've had any as strange as that, more like more frustrating than that. I can't say I've ever gotten scared when I became lucid from them, so much as pissed. No, I take that back, I've been scared before, I had a FA and a shadow was at the foot of my bed, I can't really remember what I did after that but it was some pretty weird stuff that scared me awake... Hope you don't have more FAs like those but at least on the bright side it'll make you much more aware of whether you're dreaming or not [since you naturally did quite a few reality checks]

I wish you many more, hopefully not as scary lucid dreams [fears of not waking up can be pretty intense]