Yes it is very common knowledge that birth control pills can cause blood clots. Did you smoke? Smoking increases blood clots!!
Obesity increases blood clots!
Secondly anyone who feels pain should go see a doc!! That's what docs are there for..You should have seen a doc the second your legs hurt. That is a common sign of blood clots.
There are signs..And if you smoke stop!!!! If you are overweight, get healthy and lose!