MattOAO, my two cents to aid you:
If you find it difficult to pace by feel then try a hear rate monitor
I found it difficult at first to measure effort, I started using a HRM to understand what was going on with me, I have since got better at measuring effort but still like to have my HR on my watch when running. Helps me correlate how I’m feeling to what my body is doing ie am i tired and running badly or am I feeling great and doing well. I do suggest giving it ago, my first one was just a Lidl HRM with basic watch cost around £10.
You may feel like your doing well, just please be mindful of the stress on your body.
This also, I felt good going into last week, decided to run further than I had before and mix in some hills, got carried away and ran too hard/fast and my calves ached all week! From someone that usually does this, dont get carried away too easily, I think they say dont increase your weekly miles by more than 10%-20%
Hope this helps!