1)
Why does it say "[Lifnei Lachmi] Anchasi Savo"?
1.
Rashi: It means, my sadness comes [before I eat].
2)
What is the meaning of "va'Yitechu [cha'Mayim Sha'agosai]"?
1.
Rashi #1: This is like "Nitach Artzah" - it descends like water.
2.
Rashi #2: It is an expression of increase.
3.
Ibn Ezra #1: I will scream until I cry.
4.
Malbim: Sadness is personified. Normally, its screams are held back. It is aroused before it eats, and pours like water, without restraint.


