Hello, I have gone through your query and understood your concern. Not only in pregnancy, it is natural anywhere to experience some spasm in the abdominal muscles whenever any repeated activity like coughing and sneezing occurs that involves the abdominal muscle contraction. Since there is enhanced sensitivity during pregnancy, this is felt more. Please ask your doctor if you can be prescribed simple antihistamines, since you have entered mid-trimester. You can try steam inhalation using a little eucalyptus or nilgiri oil and try rubs like vicks. Turmeric powder and honey-lemon are also good home remedies to control cold. They can be taken with milk and hot water respectively. Hope you find this information useful. Take care.