Is it possible I tore a tendon?

I know no one on GAG is a doctor, i guess I'm looking for some reassurance. My right bicep feels sore, it hurts to straighten my arm, but its not agonizing, just really tender to the touch and stiff. With two tiny bruises on it. If someone tore a tendon wouldn't the pain be unbearable?
Is it possible I tore a tendon?
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