S.D.
I would encourage you to contact a local church if you don't already belong to one. I would recommend Gilbert United Methodist Church since you're in Gilbert. Or any United Methodist Church really. They would offer help without expecting anything in return. I've heard of certain churches/denominations offering help but then they won't leave you alone even if it turns out you're not comfortable with their religion/church.
If buying food has become a financial issue, I would think about trying a food co-op. Many many people at my work participate in them and LOVE it! I want to try them myself but just haven't had the time. Here are the 3 big ones I'm aware of:
www.thetreasurebox.org
www.angelfoodministries.com
www.bountifulbaskets.org
Some are produce only, others include everything you can think of and for a fraction of grocery store prices.
I hope those recommendations help! Now may also be a good time to really get to know your neighbors. :) Good Luck and God Bless!