I was thinking it might be good for you to do if you can. Just to have your gait checked to make sure it wasn’t contributing to your injury or causing you pain. Since you sometimes have more pain during and after running, it would be good to see if there are some things you can fix. They talk through your symptoms and give you the exercises and everything.
Taking a small bit of carbs before you start. Yes, the banana, or whatever works. That 80 point drop is just your body scrambling for fuel. Feed it a little bit.
A cadence that is too low means your stride is too long, which can hurt your joints and also makes you work harder to run, because your stride is slowing you down when you plant. 180 is great.