Tricky situation

This morning my family of three were outside. My husband was laying sod, I just had for a second turned my back to begin laying fabric, and our 2 year old son pulled the wheel barrow with one roll of sod in it on himself. The barrow landed solely on his right leg. He cried for 20 ish minutes which killed me because he just was repeating mama as I held and rocked him. Once he calmed down a little we put an ice pack on it and gave him a sucker. He sat for about 30 minutes. He was able to move his leg and foot but when we asked him to stand and walk he couldn't. After some more rest he was able to put pressure and walk a few steps. After a couple hours he could walk across the yard but with limping and pain. I am usually overly dramatic about bringing him in and my husband is better at waiting it out. My question is, if he wakes up from his nap still limping with pain, what would you do? Thanks mamas