Ok, I have to ask if anyone else has had this happen... I'm 5 weeks along with my first and last night I woke up because I was flexing/clenching my vaginal muscles, and probably the muscles in my lower pelvis. I know it's voluntary, because once I wake up enough, I'm able to stop it. The thing I'm concerned about is after I stop the flexing, I get really crampy for maybe 20-90 seconds, maybe slightly longer (depending on how long the "flexing" takes place before I stop it). I had NO bleeding or spotting when this happened, but I did have a bit of a clearish discharge (similar to when you get aroused - not gonna lie, in the moment it feels good). I've read about pregnant women having spontaneous orgasms at night, but I'm not convinced that's what it is... Also, I have experienced this same occuance in the past when I was not pregnant. It happens rarely. But now that I'm pregnant, I'm concerned about the cramping I feel afterward, even though it doesn't last long. Anyone else experience anything similar??? Help!