Alamak, sayang, coughing memang boleh sebab perut tension during pregnancy lah, tapi if the stomach pain is quite bad or persistent, better check with your doctor just in case, ya? First pregnancy memang seram sikit, tapi doc akan tenang-kan your heart and check if baby okay. A few of my mum friends had this juga and turned out fine, but it's always better to get it checked out properly, especially since this is your first time! Jangan risau sangat, lepas scan and doc says all good, boleh relax. Take care!