Gut intuition?

Yesterday my bf picked me up from my sister’s place after he finished work, and he hardly looked or talked to me, didn’t answer when I asked how was his day. The entire ride was basically quiet while he had the news playing over Bluetooth. When we arrived home, I noticed headphones in his car [he doesn’t use them, I’ve never seen them before especially in his car]. I held them in my hand to see what injection head it had and it was for the new injection jack that Apple introduced when they took away the original headphone jack. I know I sound dumb, but he has an older iPhone that has the original headphone jack, and we both know that new injection head doesn’t work on his phone. When he saw I was taking a look at them, he said “it’s for work”. I didn’t even ask him anything about it, just looked at it. Immediately it gave me an off feeling. Is it a possibility that it might be someone else’s headphones? Maybe I’m overthinking idk kinda wanted to let out my thoughts on here

EDIT: The last time he was just as quiet and not even looking at me in the car was the time that apparently he exchanged numbers with a woman at healthy planet. That’s why something felt off when I saw the new headphones 🤷🏻‍♀️