Got footpain after slipping on a rock

What do I do I have slipped on a rock on a river bed and now I have done something horrible to my feet. Iv got pain in my ankle and a tight aching sensation around the sole of my foot and I cannot put any weight on it at all. I feel like such a fool. Does anyone know what I should do now? I have looked on the net but there doesn't seem to be that much info around.. and because its not "that" serious I don't want to be wasting a doctors time when there are people with more serious issues around. Will just resting my feet help? Will it just go away.. and how about prevention I read that just by getting some good insoles to put in my fishing boots but It seems insoles vary hugely in price with some costing £100 I don't have that kind of money so gotta be off the shelf ones for me like for instance these.... is that a good Idea though or should I fork out a load of cash for insoles that just look the same anyway? Also I have heard wearing an ankle brace can help prevent weird twitting has anyone tried this before?



What else can I do to help get me back fishing?



To one fishing fellow to the next please help.



Thank you!