Legs won't move

Emily
I tend to run and cycle a lot in the warmer months, but the past week my legs are just shot! I listened to what my body needed and walked several times and cut my distance short on my runs, and coasted more on my bike, but I am worried about losing my distance.
 I am about 6w today and did a lot of long runs the first few weeks. Anyone else experience this? Did it ease up?