Whom to call when I'm feeling down :(

I guess everyone has had tough days when we feel like life is going completely off tracks. Today is one such day for me. I got rejected in two companies in a single day. I'm emotionally very stable but I obviously have a limit to how much I can hold within myself. I want to call someone and pour my heart out. But I've a thing for not bothering people with my issues. I don't wanna call my mom and tell her all this because then she'll get worried, and I don't want her to worry because of me. I don't wanna call my best friend because she has an interview tomorrow and I don't wanna ruin her mood. I don't wanna sound like a loser to her. And that's the thing, being emotionally vulnerable in front of her, I'm afraid I'll sound like a weak person. I don't want that. I wanna be strong. But I wish once in a while I can pour my heart out to someone who'll actually care. Is that too much to wish for? :/