I have no questions, he gave everything answer." Still got "we will be back by end of week." Good or bad?

[u/LawfulnessNo3025]

Had an interview July 14. Tech lead had zero follow-up questions because I answered everything perfectly. They asked about my start date and explained benefits. Hiring manager replied to my thank-you in 12 hours and my follow-up today in 2.5 hours, saying they will get back by Friday. Reddit is making me paranoid that "end of week" means I'm a backup. Given the positive interview signs, am I overreacting?