That could be a number of thing's you could just have some kind of virus stomach bug i'd call your doctor and get it checked just be safe feel better
Sounds like stomach bug.My friend has the same exact thing right now,shes 34weeks.
Try yoplait yogurt it fights off the bacteria in your stomach.Always worked for me when i got the bug
Go to the dr that happened to me last week & I ended up in the hospital for four days, that's nothing to play with! I'm 30 weeks 6 days