I've got cystitis - it's come on very quickly this morning. I haven't had it for years (since pregnancy) but I remember having bouts pre pregnancy that went from no symptoms to full on blood in the wee and excruciating pain in a matter of minutes.
So I've got a doctors appointment this morning and I'm tempted to just take the antibiotics.
But, I've read that taking antibiotics for cystitis can make it worse in the long run/make you more prone to it etc.
So, take the ABs or try to flush it out with lots of water/bicarb of soda etc and just spend the day near the toilet :(