Opinion on why my pond is so muddy?

We dug a pond (2.5 acres) at the end of last summer on my property. There are trees on about 50% of the bank and the rest of the bank is wide open pasture. While digging, we hit a natural spring and it runs straight through the middle of the pond

After the rains in fall/winter, it filled up with water and was super clear

As the rains started in the early spring, it would cloud up but get clear again after a few dry days

But around mid to late April, it got cloudy and appears to be getting worse. It looks like a pond full of chocolate milk now. We have had a lot rain locally but recently went 15 days of no rain and it hasn’t changed

I’m not sure if this is typical or if it’s something I should be concerned with?