I agree with shancar. You shouldn't be in pain.
Round ligament pains feel kind of like stretchy rubberbandy stabbing pains when you suddenly stand up, and then in a moment they go away. They don't recur every 20 to 30 seconds and make you vomit from the pain.
Can you call your doctor's office?
If you are in that much pain I would call your doctor. You should not be having that much pain