That's a great swelling. Only made it to 3 hours of noogling once, and just like you, the swelling was incredible. I never made it again to noogling that long since the cups were really digging into my bones, and it was just so painful. I do have the foams but I feel like the foams are taking space around the breast's perimeter, and once I tried with the foams on, the swelling was not as great.
But yeah, it seems like noogling over an hour also seems to give me the best results. Congrats!