Ah okay, definitely helps. It was kinda weird, glad that's what it was. Thanks!
I found this. Hope it helps:
"Braxton Hicks contractions are not regular in nature and are felt as a tightening cramps on the abdomen for a few seconds to minutes. The abdominal wall could become like rock solid for a few seconds and then relaxes. When felt with the hand, the hardness could be localized to a part of the uterus. After a few seconds to minutes, the contraction is followed by relaxation"
Yes, it's possible to get them just on one side. It's just one side of the uterus contracting instead of the whole thing.
Anybody? Really curious, and I don't have another OB appointment for at least a couple of weeks.