Dog has a cut on his paw.. is limping.. almost sure its from glass shards..?

Im pretty sure my dog stepped on broken glass today while at the park. He was fine for a few hours until we got home at he started limping. I examined his paw and noticed a very small cut/gash about a mil deep. I took a light to it and didnt see shards, but could tell that the cut area was very sensitive for him. Any advice? Being Sat. night, nothing is open, i think. Also, im by myself and he weighs about 70lbs so taking tweezers to the paw is out of the question. Should i clean it? Anything i can rub on it? Should i give it a couple days? He’s obviously in pain. Thanks in advance.