Well suddenly adding fine sand
I have seen this a bunch , heavy irrigation is part of the problem but don’t stop. My well guy a very old friend has always told me if it is dirty pump it hard, wait for a few hours and pump it hard again. When you pump hard yes you stress the well but if you never pump it hard it will silt up and be a bigger problem. A string filter is his preferred method to filter the sand. You may have to change these every month or so but the few dollars spent on filters will save your water heater and every valve in your house. Keep the sand out of the house and I put filters prior to the water tank in most cases, some require the filter after? A valve prior to the filter is all that is needed in most cases, a valve after can even be better, I can change my filter in less than 1 minute. I turn 2 valves 1 prior and after the filter then spin the housing off, dump the old filter and water then put a new filter in and spin it back on, open both valves and I am done from start to finish in 1 minute a month on a 12” string filter in a shallow well (less than 100’ total depth). In a river bed that has a lot of fine sand &amp; silt. 
Note I have had a jet pump in the past but switched to a submersible a short while back and don’t notice much of a difference in needed filter changes but it has been less than a year since I made the change but I started using the new pump 3x the old one as submersible pumps are much cheaper to run than jets.