crowded hive

I have a 2-deep Langstroth hive with a medium honey super with drawn frames above a queen excluder. The bees showed little interest in the honey super until about a week ago. Yesterday there were a few hundred bees working the honey super. Today there are thousands. It's virtually overflowing...

When I went to do my first inspection the smoking didnt seem to help. Actually it seemed to anger them. Also it seems like my hive is overflowing with bees, I got my nuc in April and my 10 frame Hive seems jam packed. Is that normal? Do I need to get a super already? Thanks in advance for any...