Minimal crack in the tire flank!

Hi, I’ve found a lot of cracks in the flank now, but I’m just not really sure about mine! My problem is urgent because I need the car tomorrow morning and I don’t have any other way to get to work or even not to appear there to shower in the workshop before. And if I can make it in the evening?! I’m currently alone and have very long days accordingly at the moment. So, when I came home earlier, that’s what I’m doing on my own. I don’t know how that came in! I could hardly push the fingernail in. Think about this 1-2mm deep maybe, if at all. The question is now, how dangerous is the whole thing? As I said, I have already read a lot and would feel like it’s 50/50. Some say it doesn’t matter, the others say it’s for the sake of security. In principle, I’m more overcautious and would prefer to swap but I don’t know exactly when I can do it. And until then I have to be able to drive somehow?! Slow speed is an option? Of course something like this has to happen when everything is close anyway… Thanks for your help 🙂