I flew when I was 12 weeks. I was just told that if it was a long flight, to get up at least once an hour and walk to the bathroom, to prevent clotting.
40lb suit case no you will be just fine in a flight for 3 hours but you might want to get something you can roll and have someone pick it up for you but u shouldnt be really carrying anything .... call your doctor i drive 4 hrs when i was 15 weeks and i also got on a planr to go three hours from charlotte nc to miami flordia with a lay over in atl but didnt have a heavy bag
I traveled when I was 4 months pregnant. from Texas to Virginia
I'd definitely ask your doctor. I have heard they don't want you traveling in your first & last trimester and that it's not good to lift heavy objects. But it also depends on your pregnancy. So I'd give them a call & double check.