What feels like a charlie horse or blood clot?

Hey yall,

So yesterday I did alot of up and down the stairs...not lifting anything too heavy, && i dont recall twisting or hurting my leg....

But this morning i woke up and my left leg is more swollen and feels almost like i pulled the entire calf muscle...like a charlie horse.

Its sensitive to try to rub...but feels good lol

Im just wondering if anyone has had any sort of blood clot during pregnancy & if its common? Im just worried it might be something its probably not ...