F’ing Septic Tanks

I just noticed the water in the toilet here was not going down when I flushed (well, super, super slow--as if I had plugged it up with you know what). I also noticed the bare ground was looking damp in the yard. This happened after I did a couple of loads of laundry one day. Now I wonder if the extra water dumped by the washing machine was taxing the already small septic system? I going away for ten days, so things should have time to dry up a little by the time I return.