1. welcome to FlyerTalk!
2. "the safest" doesn't equal "one of the safest," but nitpicking aside I think you just want to reassure yourself that what just happened was safe. Fair enough.
3. You experience a "Go-Around." 99.9% Not that big a deal. The pilot had to abort landing for reasons you don't know. Maybe weather acted up (cross winds gusting out of limits, for example) or the controller in the tower warned him off for something going on near the runway, or many many other totally benign reasons.
4. Pilots care ~3% about how hard they land. You shouldn't care too much either. What matters most is that you landed safely. Hard landings happen for dozens of reasons, most of which are more about conditions than pilot not being super skilled. Landing is a cautious time, and safety matters completely more than gentleness or style.