Living on a budget anxiety

So this may sounds silly idk. We have been in such a tough financial stressful situation that we never had money. We are a family of five now and are on our way to being more then ok. We have absolutely no debt besides our home which we own most of and have savings now. We are budgeting for some trips and vacations and home projects. I'm a stay at home mom now all the time without work so definitely feel the pressure to live within our means.

We recently sat down and made a budget with what I can spend on the family per a month for the home and groceries as well as fun and entertainment. We are going to be more then ok and are actually in a great place right now and moving into such a good life too. That being said this evening I went grocery shopping and almost had a panic attack for just spending money which we have and need to for this week's meals. The idea that we are not living under so much pressure I should be so relieved but I'm so terrified it isn't real or we could be back into our old situation I am scared to even spend the money we have and need to buy what we need. I don't know if this is normal or not I just almost left the store with nothing. I'm so used to doing without I literally having the freedom and financial security to go grocery shopping even with a small list and a small budget totally freaked me out. My husband just laughed at me when I came home. We are in such a good place and I can't even enjoy it because I'm so scared. Idk has anyone experienced something like this before like the weight of financial stress is finally gone but you haven't changed your mindset?