I know Norway has a lot of gas and oil reserves - about as much as the UK but only a 12th or so of the population ? Iceland has geothermal power and fishing - and is basically the population of Leicester - so plenty of fish for everyone. Switzerland - well it hasnt had to rebuild after world wars - and have you seen the price of toblerone and Lindt.
I'm not sure they're quite the same as the UK ?
But they have to pay for being in the EEA and accept free movement, two of the main things the leavers were against. We'll probably be the same if we want free trade with the EU so how exactly are we going to be better off??
Your description above of where the pain is does sound like that after pushing really hard after a tough race, tight muscles. I read that you use a foam roller, that'll help if used properly and regularly but the root cause is likely your body complaining about doing things it's not used to. It'll ease with time and a slow build up, you'll get there, just be patient
Sounds like you are doing a bit too much too soon. Normally 5-6km then an 8? That's nearly a 50% increase in distance - this just sounds like fairly typical overuse pain. Have a look through the injury forum, loads of people in the same boat. Build up very slowly and no more than a 10% increase in time or distance. But you'll need to cut right back for a while until things settle down then start a slow build up again.