Travel during 2nd trimester

Dear experienced mommies, my sister going to engaged on July 2019. That time i shall be 4months plus. but my gynae said do not travel far as my hometown is kedah. Im currently stay in Jb. So i thought taking flight shall be ok, but he said no as well. ??? Since i lost my 1st baby last pregnancy, the gynae said to be extra careful. but how could i never go to my own sister's engagement? My sister's marriage always delay due to some reason all this while. But this time, somehow they manage to make it happen. I should not be a reason for the delay again. Im headache now. Mind share your opinion?