Trying so hard to save money

It is so hard to try to budget your money on a low income and 4 kids. I went yesterday grocery shopping and did the price match at Wal-mart for the first time...It was so stressful cause I was not super prepared....I think I need to call my friend Alison. =) I did pretty good but still have tons to work on. It is extremely difficult to save when you are living beyond paycheck to paycheck. I can only pray that I can get the hang of all this and if you have advice please leave comments. We have done tiding first and everything after but man it is a challenge with in itself. This is my most biggest stress is financial.