hi my name is alicia,and im 21 years old.back in 2010 when i was 23 weeks pregnant on my son i developed blood clots on both lungs,which was a very scary experince,the thing is i was on the clexane up untill my son was 6 weeks,now im not on nothin,my son is now 17 months,but over the last few day,everytime i go out and walk,after about 5 minuites i got to stop because i cant breathe tidy and my chest stars to hurt,and its very worrying for me,im just wondering if anyone had any advise as to is this a sign of asthma or is it something to do with when i had the blood clots?im just scared really ,and keep thinking its come back or if its something different like asthma.