in about a month, i will be flying to paris (from ny). i have not been on a plane for 4 years, which was before i began having IST issues. should i be concerned about flying? i am on atenolol for the tachycardia, and i do not think i have blood pressure issues (i don't faint randomly or when standing) although it's on the low side sometimes. but i do have poor circulation, brought on, i think, by the atenolol. also, i am on birth control, which i know increases a chance of blood clots (but i am 20 and don't smoke, so i don't know if i am really at risk).
and thoughts/experiences/insight is appreciated!