I was driving at very low speed in a campsite, I turned too early around a corner and hit my inside rear tyre on a rock. Turns out the rock was sharp and slashed a small part of the tyre wall (about .3cm in depth) and I’m wondering if I should worry. My car is FWD and I am halfway through a trip around Europe (~600 miles left), no spare tyre, only a repair kit as is normal these days. Any help would be greatly appreciated! Thanks!