Not quite so early, but yes, our nearly three month old DS suddenly started refusing the potty. We backed off a little, I think we were getting too stressed about it and focusing too much on outcome rather than process. We decided to only put him on the potty at diaper changes or if he gave a really clear signal, and take him off the potty immediately if he twisted or fussed. Within a week we were back to our usual high catch/low miss rate. FWIW, this "strike" coincided with my having purchased bright bots training pants for him, which are not quite waterproof (but oh so cute) and probably raised my stress level and his. We went back to diapers when out and nakey-butt at home and soon we were back on track. We use the bright bots on occasions when we can be more relaxed about a possible miss.
Good luck.
Good luck.