Mom caught condom from my wallet and her reaction is so crazy

I'm 22, and I was studying in Kochi a couple of months ago. Back then, I had a single condom in my wallet. My brother took a picture of it without asking or telling me, and I didn't even know. He actually took that pic in November. when we were in a heated argument, he showed it to Mom. He's 17. My mom started crying and hurting herself. She began smashing her head on the wall and crying. My dad watched all this and didn't react at all. And Mom said, "Is this why I spent money to send you to Kochi to study?" I don't know what to say. I told her I got it from my friend's room and just took it out of curiosity. What should I do now? She's not even listening to me. I don't want to make her sad. I don't know how to face her tomorrow.