Hi. I had absolutely awful grocery store anxiety too. It got to the point that I found a store open all night and would shop at 2am.

The stores switched hours though and I found myself doing my shopping right at opening.

I had a great therapist. She had me do a few things. Firstly, she forbade me from using a self checkout. I am now grateful for this. In her office she made me draw up two lists: what were the advantages to being anxious and what were the disadvantages to being anxious. She had me do the same for advantages for and against shopping at the crack of dawn (we agreed that it probably wasn't very safe).

Then, she had me go a half hour later and later and later each week.

She once even met me at the store, she bought me a coffee, and she followed me around shopping together (perhaps she might have been observing my dietary choices too?).

It took 3 months to get to the point where I can shop. I still do so with a coffee - it seems as though holding it in my hand is my coping mechanism.