Hi, at 9 weeks it's generally okay to fly but really best to check with your gynae first since pregnancy can be unpredictable early on. A few of my mum friends flew during first trimester without issues, but they all got the green light from their doctor before booking. Just make sure you have your medical records handy and wear compression socks on the flight if you do go.
Yes you can! I travelled to South Korea when I was 8 weeks pregnant.