1994 Dodge Van

I have a 1994 Dodge Caravan SE 10 year limited edition, that was bought brand-new in 1994, and was/is kept in the garage.

Yesterday, after I had driven it for about one hour it suddenly stalled on me while I was pulling onto the parking lot of my local grocer. The speed was no more than 15 mph at that moment.
I restarted the car without any problem and made it 8 feet or so, before it stalled on me again. Restarted the car and 30 sec. Later the same. Did this 2 more times. The last time the car ran long enough for me to park. It then stalled on me again and didn't try anymore to start the car.

A worker in the store thought it could be the fuel pump, but when my husband and his mechanic looked at this morning (and drove it around for about 15 min.) Everything ran just fine, and they do not think it is the fuel pump, nor can they figure out what the problem might/could be.

Do you have any idea, because right know I am afraid to drive the car.

Thank you in advance.