Feeling guilty

I just denied my son a bite of my sandwich. I told myself that I would never be greedy with food especially with my children. I’ve been in this house 24/7 with my son for about a month and a half and its been interesting. I love my son but today we’ve been under each others skin. I’m preparing dinner but I made a side sandwich because I was kind of hungry. Well he saw me and asked for a bite and I said no just wait for dinner and then I said here take half. He said no never mind and I ate my sandwich that didn’t even taste good after I told him no. Now I’m full of guilt and my conscience is giving me a lecture. 🥺