I have the feeling that this is a stupid question but I'm wondering whether this can wait until tomorrow. For the past couple of days I've had on-off stabbing pains under my upper left ribs. They only last a minute or so but during that time I can't take a full breath. I'm 28 weeks pg. Has anyone else had this? I'm thinking it's either general stretching or related to some major surgery I had in the same area last year. Definitely not heartburn.