36 weeks cramping

For the last day and a half, I have had on and off upper abdomen cramping. It only lasts maybe five seconds, and happens infrequently. For the past week, I've been having more loose bathrooms and had an urge to go more often. I called my doctor on Friday, and they just said to take it easy and drink more water. Said not to worry unless it happens more frequently or become too strong to handle.