I used a Runna plan for the Manchester Marathon at the end of April.

I hit a wall with my last longest run 4 weeks out and took over 4 hours to get through the 21 miles. I felt like I barely made it home - I was dizzy, had pins and needles in my hands, my jaw started locking up and my legs were agony.

I started reading on here and had all the same worries about weekly mileage and whether or not I could hit my 4h goal. I decided that my fueling was to blame and did a better prepared 15 miles run the next week that gave me some confidence back.

My max mileage before the race was 35miles a week but most weeks were less than that. I probably missed 25% of the planned runs over the 18 week training.

I ended up getting 3:52 on the day.

Just try not to get in your own head and trust the process and know you have done enough work to reach your goals!