hello ANAYA1987,
I had a small pea size lump on my breast before. I ignored it since it doesn't hurt. However, the longer I ignored it the bigger it grows. Luckily, my doctor said it was not that serious since it moves when I touch it. He suggested for it to be removed before it gets bigger or worse. I think you should have yours checked.
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Dear ANAYA1987: There are many possible explanations for small lumps but without evaluation, it is impossible to speculate on what this might be. If it does not go away in a week or so or if it gets worse, you should see your doctor for evaluation.