Bruising After Thrusting During Intercourse. Spread Along The Shaft, Tip Dark. Swelling Reduced, No Pain. Healing?

My boyfriend and I had intercourse yesterday and on thrusting hit me on an awkward angle. As soon as he pulled out, it had started to swell at the bottom but was still partly erect. We iced it and went to emergency. Bruising did not occur till 3-4 hours later. Saw a doctor, who said he was bruising. And the urologist who said it looked like bruising and a minor tear but was happy for him to go home. By then the swelling had reduced but there was bruising slightly around the base and on the underside. This was last night. This morning I had woken up to check on the bruising. And it had spread all along the shaft, just on the underside but also now around the tip and is a dark colour. Went back and saw the urologist who gave two options of healing itself or surgery. We were told if he was able to get an erection then we had less to worry about. So when he achieved an erection we could go home.Is it normal for the bruising to spread and swell only very very slightly, the way a normal bruise would eg black eye. Or should we go back to emergency?Right now. Swelling for the shaft has gone down. Still slight swelling but nothing bigger than 2.5cm diameter just where the new bruising is occuring. The bruising colour has spread and looks quite purple and blue. There is no pain and urination is completely normal.