Based on what you've written I'd run on Sunday. If it eases after some gentle jogging or generally doesn't feel debilitating running in terrain then give it a go. Just stop and walk back if it gets too painful.
P.S. You can blame me if it goes wrong. I'm a computer programmer.
P.P.S Kim has no awareness of this. I'm just guessing based on my own personal experience.The power of the point sample vs the power of retrofitting all that big data with some nice graph-generating software. Have you seen the p-values on this baby?