The pump you installed. Was it made to pump pressure or volume?
The new pump may be a high volume pump, and is having a hard time trying to keep up the pressure you need.
What size/hp and gpm is the pump?
Lots of times, when a new pump is installed/replaced, it can make a little dirty water for a bit. It should clear up pretty quick. When a well is pulled and replaced, it's kinda like plunging the well.