Why do so many things happen when I wear a cross necklace?

I think you worry too much. What happened to your boyfriend or your health problems are definitely not caused by wearing a cross, because there is no necessary causal relationship. The pendant has no magical power, it is just an ornament. As for the fortune teller, how did he know you were wearing a cross? Your mother must have told him first. Here you think your mother doesn't even know you're wearing a cross. There may be a misunderstanding. Your mother may already know that you are wearing a cross. If your mother really doesn't know that you wear a cross, but the fortune teller doesn't, then maybe you should pay attention, spiritual things may interfere in your life. But that's unlikely. Peace be with you, and God bless you.