Willow2, I'm sure you can blame earache for a lot of this right now.
However, I have a theory about tantrumming two year olds, based solely on my older son, so this is really IMO and IME.
Brace yourself. The two year old tantrums are simply there to prepare you for the full blown three year old tantrums, which are there to prepare you for who knows what - probably adolescence. Havn't got there yet, so I can't confirm this last bit. In other words, it gets worse before it gets better - sometime around four years old.
But remember, you get more used to the wobblies, too, so by the time your angel is rising four, you're simply stepping over them and ignoring the pleas, yawning in boredom or automaticlly hauling them away for some time out etc, when the screaming and flailing on the floor begins.
As Marina says, once they can talk well, it also becomes quite heartrending to hear their side of the story, when things have calmed down and the lines of communication reopen.
Honestly, your beautiful son is still there, it's just that he's a bit more full on.