De tanto...

De tanto...
 

The sentence in Spanish: De tanto pensar en mi problema, me volví loca.

It seems to mean something like: Thinking about my problem, I became crazy. (Or, the sense of: Thinking about my problem I suddenly became enraged. Right?)

The part I don't get is the "De tanto..." What does that mean?

Thinking about my problem so much drove me mad.

(Lit. From thinking so much about my problem, I went mad).

Thanks!!