@now05ster You are increasing your speed + distance at the same time. You are asking for injury. Only ever work on one of them at a time.
Early in your running career you are going to face niggles here in there. If its too painful to run then make sure you rest. If it doesn't subside after a few days then go see a physio. If you are itching to get back on the road/trails, do a combination of running and walking (eg: walk for 3min, run for 2min - max 30min)
Whenever I am training for an ultra, I always work in 4 week blocks. Let's say you start with 50km of mileage in week 1. You increase by only +-10% for week 2 (55km), and then the same for week 3 (60km+-). Week 4 you head back to your week 1 mileage ('recovery'). In week 5 (new block), you start on your original week 2 mileage (55km). You then build up again. Usually 3-4 blocks does the trick depending on the ultra distance / conditions.
The same principle can apply for any distance in my opinion. Always respect the 10% mileage limit.
Lastly, the right shoes play a role for certain people, however you can just be like me. I only wear Salomon's (their trail shoes - Sense Rides, Pro's and Ultra Pro's) for both the road and trail. Always worked for me. Some shoes are just good all rounders.