Yes, it is very common symptoms from a concussion. A concussion is usually describing injuries to brain, which might be caused any serious blunt force on the head. Concussion especially describe these injuries to brain which don't cause any bleeding in the skull, so it is not lethal. Some common symptoms associated with a concussion include blurry vision, headache, nausea or vomitting, loss of consciousness temporarily, confusion, loss of some memory or perseverating. As to bloodshots in eyes, we might get them easily. Simply eye strain, or very common daily movements with force would cause these bloodshots in eyes, because the capillaries in eyes are very delicate and fragile. Just weight lifting might cause the bloodshots too. So you can imagine, a strong and serious blunt force on the head would easily cause some bloodshots. But as it comes easily, it goes off easily too. Bloodshots can heal up within days without requirement of any treatment. Don't worry too much.
