Hello ladies, 
My sister is completing the 18th week of her pregnancy this Monday. Since the last few days, she has been complaining about an occasional feeling of tightness in her abdomen which almost knocks her out of breath for an instant. Its not painful, but she is still getting worried about it as it is only her first pregnancy. We did some research on the internet and found out about the braxton hicks or false contractions. But apparently, they do not occur before the third trimester. Could my sister be having these false contractions a little earlier than normal or are they something different?