Hello, I have gone through your query and understood the concern. Since this is your second pregnancy, if you had a normal vaginal delivery in your last issue, you will be well aware of uterine contractions. The twitching sensations you are experiencing right now are more likely to be early Braxton-Hicks movements. Fetal movements can be appreciated in later pregnancies as early as 12 weeks onward. Abdominal muscle cramps are another possibility, owing to electrolyte and mineral imbalances. A clinical evaluation and a follow up sonogram helps solve the confusion. Please take adequate bed rest and avoid stress. Take care.