Im going nuts or what

I was supposed to upload something yesterday as the deadline was yesterday, 10th Jan, when I was about to upload that doc, I saw that the deadline was 11th Jan, I was happy and thought May be they must have extended the deadline. Today , on the 11th when I was about to upload it, the deadline was 10th! I lost my mind, I called the university ( it was for a uni admission) and they confirmed the deadline was alway 10th and there was no glitch in the portal. I went through some stress recently and I had my period also yesterday.. I’m so worried! How could I see 11? Am I going nuts? Has something similar happened to you?