hi...seem to have some sore spots down below after 2 long days on riding (80 miles each day). have been riding for about a year, all 50+mile rides and this has not happened before. have a terry butterfly which is/has been comfortable. wore PI's both days. and used chamois cream (assos). just a few bumps near the creases of my legs. are these saddle sores? any suggestions on what to do next time? better/different shorts or chamois butter? thanks!