Worried about oxidation
I'm brewing my second batch and had a bit of an accident yesterday. I brewed 20l two days ago and when I checked my fermenter (bucket) yesterday it had overflown. I don't know what possessed me to open the lid and clean in, instead of just cleaning the mess and airlock, but I did. The bucket was open for maybe 10-15mins. I did clean and sanitize both lid and airlock, so hopefully there's no contamination, but I am worried about oxidation. Should I be? When and how will I know if it happened? Is there any way to fix it?