Today I went out for a ride, and experienced some VERY unpleasant "bits" pain. I just bought some new Santini twist Gel bibs--this was their maiden voyage...I'm thinking Titanic. I had a small amount of chafing in the sit bones area and a nasty burning sensation in the girly parts, which I am still experiencing post ride. I have been wearing Giordana Laser bibs all summer and not experienced any issues. I did recently switch out my stem for a smaller one to try and alleviate some shoulder and neck pain. I have had my bike professionally fit several times in the last couple of months, switched saddles (helped ALOT), etc.

My question is could this are the shorts the culprit? Is my body just readjusting to the new stem? Should I suck it up and move on?