It was the worst pain I ever had, like someone was systematically driving a spike through my jaw. The blood clot that forms in the wound comes out, causing the "socket" to be ultra sensitive and hinders healing. There's this disgusting clove oil packing that the dentist puts in, which feels so wonderful you sort of don't mind the lingering taste of clove. Swimming wasn't prohibited for me, but no smoking or drinking through a straw, things that might dislodge the clot. I think you're cool with swimming!