Hi Sussex: No, the cramping stopped, thankfully, a couple of days after I was asking about it, after some really good massage sessions from my husband. No idea why it started, very glad it stopped! In fact, I'm not even needing to massage my calves every evening & morning - probably related to better stretching associated with my 15-minute morning Pilates routine (I can nearly do a full squat with feet flat on the floor, now).