If there's bruising visible, that suggests a muscle tear as tendons aren't really that well vascularized. But up near your delt isn't really the biceps muscle belly either. Are you sure it's the biceps? Perhaps the corachobrachialis? A picture of the bruise might help locate the precise muscle. I'd look into the Starr rehab protocol. You want to minimize scar tissue in the muscle for obvious long term reasons.