What a shock for you and your family. As already mentioned rest, recuperate and let the experts do their thing. Let them know of any twinges or discomfort. The angiogram will let them know exactly what if any interventions need doing. If your unsure of anything ask and ask again they will explain.
Linesman on the west side/halfwayline must have seen it, I did and he was stood near me. I agree goalie was shielding the ball, their view may have been blocked but his wasn't.