Similar thing here – nearly a month ago sorting some stuff out in the garden I stepped back and hadn’t noticed there was a large, very heavy concrete flowerpot behind me. Fortunately I went down onto the patio on my side, rather than backwards, which could have been catastrophic, but I’ve always got a bunch of keys in my pocket and I landed hard on them, just below and behind my hipbone.
Over the course of a couple of days, it got progressively more painful, to the point I couldn’t even put my bloody socks on properly without an immense amount of pain.
A couple of weeks later, I stepped out of the bath, having basted myself for half an hour in a Radox and Epsom salts bath, and the jolt of pain that went down my leg was so intense I nearly passed out! I had a prickly sensation all over, I had a rushing sound in my ears, and my vision started to grey out! I managed to get into my bedroom and lay on the bed, still soaking wet, for ten minutes or so, before everything settled down.
It’s largely healed up now, but even trying to sleep was difficult, trying to find a comfortable position to lay in.
That’ll teach me to look behind me in future!
I did see my doctor, all he could suggest was physio excercises, whereas Voltarol and CoCodamol helped a lot more. *shrug emoji*