Flying during pregnancy

Hi there!
I'm now 12 weeks and 5 days pregnant, my boyfriend is from Spain and I'm from the Netherlands, we've been living together and moving around crazily for the past few years, and are now settling in the Netherlands. I've flown twice already this pregnancy and have another flight scheduled this week, and the week after. I'm getting a bit worried about flying often during pregnancy. Any women with experience? 
Can't wait to hear!!!