I have a septic system in the country. The toilet flushes but today the water is now brown every time I flush.?

The house was built in seventies. Located where the weather is freezing often in winter. There has recently been some rain but not more than usual for the area. When I flush the toilet the shower gurgles, as well as the mud room drain when I do laundry. I have been pretty careful about using too much toilet paper, have used RId-Ex occasionally. So today for the first time in 2 and a half years of clean toilet water, it is now a brown. Do I call septic people and get the system snaked? The brown water is freaking me out, not to mention the gurgling.Is it an indication of broken pipes?