hello and welcome to the forum,
congratulation for your precious pregnancy
madam you have not mentioned the no. of weeks of your pregnancy.
travelling in the first and the third trimester is not recommended by doctors , as there can be risks and side effects,.
your is a precious pregnancy as it is your first pregnancy at the age of 35yrs.
plus the symptom of abdominal pain
could just be a preliminary sign of threatened abortion
take care and do not travel, rather take as much rest as possible till the cramps abdominal pain subsides.
do consult your doctor as soon as possible for the same.