Travelling at 30weeks...

I hope someone has some advice/personal experience to share....My little sister is getting married in April and I'll be 30w at their wedding. I am extremely excited (as expected) but a little concerned since I need to trave 930miles (1500km) to attend the wedding 😳. We thought traveling by train might be the best option since it will still give me opportunies to walk around and stretch my legs but it feels like all that shaking can't be good? I have had an uncomplicated pregnancy thus far and will double check with my obgyn when I see her in 3 weeks time but I can't help but feel anxious 😕