Good luck! I hope it turns out to be nothing serious. I was 19 when I developed a blood clot in my arm. I was otherwise completely healthy, no documented illness that would contribute to the clot, no birth control pills, no other symptoms, nothing at all that would explain it. It was just one of those freak things. Thankfully, I didn't lose my arm - or my life - but apparently it was iffy for a while there. Personally there's no way I'd get on a plane if I was already exhibiting symptoms of possible blood clots. They are too dangerous to mess around with and I'd want the peace of mind that a clean bill of health from a doctor would give me.