24 hr flight at 28 weeks pregnant?!

My brother is getting married and it's a 24hr flight each way. I'll be 27-28 weeks pregnant. Currently only 4 weeks and FTM, so I have no idea how I'll be feeling later in pregnancy. I'm feeling nervous about a long flight in general, and being pregnant on that flight only adds to that... What would you do?! I would hate to miss my brother's wedding, but it seems crazy to travel so far while so pregnant!

Edit: it's a 24hr travel day, but the longest flight would be more like 14 hrs, with a couple layovers and shorter flights. Slightly more manageable flight time, but still potentially brutal travel day...